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  • Implementing synchronous MediaTypeFormatters in ASP.NET Web API

    - by cibrax
    One of main characteristics of MediaTypeFormatter’s in ASP.NET Web API is that they leverage the Task Parallel Library (TPL) for reading or writing an model into an stream. When you derive your class from the base class MediaTypeFormatter, you have to either implement the WriteToStreamAsync or ReadFromStreamAsync methods for writing or reading a model from a stream respectively. These two methods return a Task, which internally does all the serialization work, as it is illustrated bellow. public abstract class MediaTypeFormatter { public virtual Task WriteToStreamAsync(Type type, object value, Stream writeStream, HttpContent content, TransportContext transportContext); public virtual Task<object> ReadFromStreamAsync(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger); }   .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } However, most of the times, serialization is a safe operation that can be done synchronously. In fact, many of the serializer classes you will find in the .NET framework only provide sync methods. So the question is, how you can transform that synchronous work into a Task ?. Creating a new task using the method Task.Factory.StartNew for doing all the serialization work would be probably the typical answer. That would work, as a new task is going to be scheduled. However, that might involve some unnecessary context switches, which are out of our control and might be affect performance on server code specially.   If you take a look at the source code of the MediaTypeFormatters shipped as part of the framework, you will notice that they actually using another pattern, which uses a TaskCompletionSource class. public Task WriteToStreamAsync(Type type, object value, Stream writeStream, HttpContent content, TransportContext transportContext) {   var tsc = new TaskCompletionSource<AsyncVoid>(); tsc.SetResult(default(AsyncVoid));   //Do all the serialization work here synchronously   return tsc.Task; }   /// <summary> /// Used as the T in a "conversion" of a Task into a Task{T} /// </summary> private struct AsyncVoid { } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } They are basically doing all the serialization work synchronously and using a TaskCompletionSource for returning a task already done. To conclude this post, this is another approach you might want to consider when using serializers that are not compatible with an async model. Update: Henrik Nielsen from the ASP.NET team pointed out the existence of a built-in media type formatter for writing sync formatters. BufferedMediaTypeFormatter http://t.co/FxOfeI5x

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  • Converting ANTLR AST to Java bytecode using ASM

    - by Nick
    I am currently trying to write my own compiler, targeting the JVM. I have completed the parsing step using Java classes generated by ANTLR, and have an AST of the source code to work from (An ANTLR "CommonTree", specifically). I am using ASM to simplify the generating of the bytecode. Could anyone give a broad overview of how to convert this AST to bytecode? My current strategy is to explore down the tree, generating different code depending on the current node (using "Tree.getType()"). The problem is that I can only recognise tokens from my lexer this way, rather than more complex patterns from the parser. Is there something I am missing, or am I simply approaching this wrong? Thanks in advance :)

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  • Java EE@Princeton Java Meetup

    - by reza_rahman
    On November 28th, I spoke at the Princeton Java Meetup Group. It's a well-organized group led by veteran Java champion Yakov Fain - I have spoken there numerous times. I did my Java EE 6 DDD talk (the same one from Java2Days 2012). Domain Driven Design with Java EE 6 from Reza Rahman The code examples are available here: https://blogs.oracle.com/reza/resource/dddsample.zip. Give me a shout if you would like to get it up and running. The talk went very well -- the official RSVP shows 33 attended. I gave away a few GlassFish T-shirts, laptop stickers and Arun Gupta's Java EE 6 pocket guide. More details on the talk here. I most certainly look forward to speaking there again.

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  • Segfaulting Java process

    - by zenmonkey
    I've a java process that is working on some large data set in memory. I've seen it crash with a SIGSEGV signal sometimes, so i was wondering some potential causes and fixes could do. Caues: - JVM bug - Native library bug (e.g pthreads etc) - JNI bug in user code Fixes: - Upgrade to new JVM In my particular case, this is the output form the log file (pruned) A fatal error has been detected by the Java Runtime Environment: # SIGSEGV (0xb) at pc=0x00002aaaaacd1b94, pid=32116, tid=1086544208 # JRE version: 6.0_14-b08 Java VM: Java HotSpot(TM) 64-Bit Server VM (14.0-b16 mixed mode linux-amd64 ) Problematic frame: C [libpthread.so.0+0xab94] pthread_cond_timedwait+0x154 # If you would like to submit a bug report, please visit: http://java.sun.com/webapps/bugreport/crash.jsp # --------------- T H R E A D --------------- Current thread (0x00002aacaad41000): WatcherThread [stack: 0x0000000040b35000,0x0000000040c36000] [id=32141] siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR), si_addr=0x00002aabc40008c0 Registers: RAX=0x0000000000000000, RBX=0x0000000000000000, RCX=0x0000000000000000, RDX=0x0000000000000002 RSP=0x0000000040c34cc0, RBP=0x0000000040c34d80, RSI=0x0000000000000001, RDI=0x00002aabc40008c0 R8 =0x00002aacaad42528, R9 =0x0000000000000000, R10=0x0000000040c34cd8, R11=0x0000000000000202 R12=0x0000000000000001, R13=0x0000000040c34d40, R14=0xffffffffffffff92, R15=0x00002aacaad42550 RIP=0x00002aaaaacd1b94, EFL=0x0000000000010246, CSGSFS=0x000000000000e033, ERR=0x0000000000000006 TRAPNO=0x000000000000000e Top of Stack: (sp=0x0000000040c34cc0) 0x0000000040c34cc0: 0000000000000000 00002aabc40008c0 0x0000000040c34cd0: 00002aacaad42528 0000000000000000 0x0000000040c34ce0: 0000000002fae0e0 0000000000000000 0x0000000040c34cf0: 00002aaaaacd1750 0000000040c34cc0 0x0000000040c34d00: 00002aacaad42528 0000000000000000 0x0000000040c34d10: 00002aacaad42528 00002aacaad42500 0x0000000040c34d20: 0000000000000032 00002aaaabadf876 0x0000000040c34d30: fffffffdaad40e80 0000000040c34d40 0x0000000040c34d40: 000000004bbb7166 0000000015f07098 0x0000000040c34d50: 0000000040c34d80 00138cd32df59cce 0x0000000040c34d60: 431bde82d7b634db 00002aacaad429c0 0x0000000040c34d70: 0000000000000032 00002aacaad429c0 0x0000000040c34d80: 0000000040c34e00 00002aaaabadda6d 0x0000000040c34d90: 0000000040c34da0 00002aacaad42500 0x0000000040c34da0: 00002aacaad429c0 00002aaa00000002 0x0000000040c34db0: 0000000000000001 0000000000000002 0x0000000040c34dc0: 0000000040c34dd0 00002aaaabb6f613 0x0000000040c34dd0: 0000000040c34e00 00002aacaad41000 0x0000000040c34de0: 0000000000000032 00002aacaad429c0 0x0000000040c34df0: 00002aacaad41000 0000000000001000 0x0000000040c34e00: 0000000040c34e60 00002aaaabbc39fb 0x0000000040c34e10: 0000000040c34e40 00002aaaabab868f 0x0000000040c34e20: 00002aacaad41000 00002aacaad42aa0 0x0000000040c34e30: 00002aacaad42aa0 00002aaaabe10630 0x0000000040c34e40: 00002aaaabe10630 00002aacaad42aa0 0x0000000040c34e50: 00002aacaad429c0 00002aacaad41000 0x0000000040c34e60: 0000000040c35130 00002aaaabadff9f 0x0000000040c34e70: 0000000000000000 0000000000000000 0x0000000040c34e80: 0000000000000000 0000000000000000 0x0000000040c34e90: 0000000000000000 0000000000000000 0x0000000040c34ea0: 0000000000000000 0000000000000000 0x0000000040c34eb0: 0000000000000000 0000000000000000 Instructions: (pc=0x00002aaaaacd1b94) 0x00002aaaaacd1b84: 88 22 00 00 48 8b 7c 24 08 be 01 00 00 00 31 c0 0x00002aaaaacd1b94: f0 0f b1 37 0f 85 e8 00 00 00 8b 57 2c 48 8b 47 Stack: [0x0000000040b35000,0x0000000040c36000], sp=0x0000000040c34cc0, free space=1023k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) C [libpthread.so.0+0xab94] pthread_cond_timedwait+0x154 V [libjvm.so+0x594a6d] V [libjvm.so+0x67a9fb] V [libjvm.so+0x596f9f] --------------- P R O C E S S --------------- Java Threads: ( = current thread ) 0x00002aacaad3f000 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=32140, stack(0x0000000040a34000,0x0000000040b35000)] 0x00002aacaad3c000 JavaThread "CompilerThread1" daemon [_thread_blocked, id=32139, stack(0x0000000040933000,0x0000000040a34000)] 0x00002aacaad37800 JavaThread "CompilerThread0" daemon [_thread_blocked, id=32138, stack(0x0000000040832000,0x0000000040933000)] 0x00002aacaad36800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=32137, stack(0x0000000040731000,0x0000000040832000)] 0x00002aacaab7d800 JavaThread "Finalizer" daemon [_thread_blocked, id=32136, stack(0x0000000040630000,0x0000000040731000)] 0x00002aacaab7b800 JavaThread "Reference Handler" daemon [_thread_blocked, id=32135, stack(0x000000004052f000,0x0000000040630000)] 0x0000000040115800 JavaThread "main" [_thread_blocked, id=32117, stack(0x000000004012b000,0x000000004022c000)] Other Threads: 0x00002aacaab75000 VMThread [stack: 0x000000004042e000,0x000000004052f000] [id=32134] =0x00002aacaad41000 WatcherThread [stack: 0x0000000040b35000,0x0000000040c36000] [id=32141] VM state:at safepoint (normal execution) VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event]) [0x0000000040112e80] Threads_lock - owner thread: 0x00002aacaab75000 [0x0000000040113380] Heap_lock - owner thread: 0x0000000040115800 Heap PSYoungGen total 1854528K, used 1029248K [0x00002aac025a0000, 0x00002aaca8340000, 0x00002aaca9040000) eden space 1029248K, 100% used [0x00002aac025a0000,0x00002aac412c0000,0x00002aac412c0000) from space 825280K, 0% used [0x00002aac412c0000,0x00002aac412c0000,0x00002aac738b0000) to space 812800K, 0% used [0x00002aac76980000,0x00002aac76980000,0x00002aaca8340000) PSOldGen total 4423680K, used 4423651K [0x00002aaab5040000, 0x00002aabc3040000, 0x00002aac025a0000) object space 4423680K, 99% used [0x00002aaab5040000,0x00002aabc3038fe8,0x00002aabc3040000) PSPermGen total 21248K, used 5848K [0x00002aaaafc40000, 0x00002aaab1100000, 0x00002aaab5040000) object space 21248K, 27% used [0x00002aaaafc40000,0x00002aaab01f61f0,0x00002aaab1100000) Dynamic libraries: 40000000-40009000 r-xp 00000000 08:01 313415 /usr/java/jdk1.6.0_14/bin/java 40108000-4010a000 rwxp 00008000 08:01 313415 /usr/java/jdk1.6.0_14/bin/java 4010a000-4012b000 rwxp 4010a000 00:00 0 [heap] 4012b000-4012e000 ---p 4012b000 00:00 0 4012e000-4022c000 rwxp 4012e000 00:00 0 4022c000-4022d000 ---p 4022c000 00:00 0 4022d000-4032d000 rwxp 4022d000 00:00 0 4032d000-4032e000 ---p 4032d000 00:00 0 4032e000-4042e000 rwxp 4032e000 00:00 0 4042e000-4042f000 ---p 4042e000 00:00 0 4042f000-4052f000 rwxp 4042f000 00:00 0 4052f000-40532000 ---p 4052f000 00:00 0 40532000-40630000 rwxp 40532000 00:00 0 40630000-40633000 ---p 40630000 00:00 0 40633000-40731000 rwxp 40633000 00:00 0 40731000-40734000 ---p 40731000 00:00 0 40734000-40832000 rwxp 40734000 00:00 0 40832000-40835000 ---p 40832000 00:00 0 40835000-40933000 rwxp 40835000 00:00 0 40933000-40936000 ---p 40933000 00:00 0 40936000-40a34000 rwxp 40936000 00:00 0 40a34000-40a37000 ---p 40a34000 00:00 0 40a37000-40b35000 rwxp 40a37000 00:00 0 40b35000-40b36000 ---p 40b35000 00:00 0 40b36000-40c36000 rwxp 40b36000 00:00 0 2aaaaaaab000-2aaaaaac6000 r-xp 00000000 08:01 49198 /lib64/ld-2.7.so 2aaaaaac6000-2aaaaaac7000 rwxp 2aaaaaac6000 00:00 0 2aaaaaac7000-2aaaaaad0000 r-xs 0006d000 08:10 29851669 /mnt/home/jatten/workspace/common/build/lib/common.jar 2aaaaaad2000-2aaaaaad3000 rwxp 2aaaaaad2000 00:00 0 2aaaaaad3000-2aaaaaae0000 r-xp 00000000 08:01 315357 /usr/java/jdk1.6.0_14/jre/lib/amd64/libverify.so 2aaaaaae0000-2aaaaabdf000 ---p 0000d000 08:01 315357 /usr/java/jdk1.6.0_14/jre/lib/amd64/libverify.so 2aaaaabdf000-2aaaaabe2000 rwxp 0000c000 08:01 315357 /usr/java/jdk1.6.0_14/jre/lib/amd64/libverify.so 2aaaaabe2000-2aaaaac0a000 rwxp 2aaaaabe2000 00:00 0 2aaaaac0a000-2aaaaac0f000 r-xs 0003a000 08:10 30326840 /mnt/home/jatten/workspace/common_ml20010405/build/lib/common_ml.jar 2aaaaac0f000-2aaaaac12000 r-xs 00020000 08:10 29786222 /mnt/home/jatten/pagescorer.jar 2aaaaacc5000-2aaaaacc6000 r-xp 0001a000 08:01 49198 /lib64/ld-2.7.so 2aaaaacc6000-2aaaaacc7000 rwxp 0001b000 08:01 49198 /lib64/ld-2.7.so 2aaaaacc7000-2aaaaacdd000 r-xp 00000000 08:01 49280 /lib64/libpthread-2.7.so 2aaaaacdd000-2aaaaaedc000 ---p 00016000 08:01 49280 /lib64/libpthread-2.7.so 2aaaaaedc000-2aaaaaedd000 r-xp 00015000 08:01 49280 /lib64/libpthread-2.7.so 2aaaaaedd000-2aaaaaede000 rwxp 00016000 08:01 49280 /lib64/libpthread-2.7.so 2aaaaaede000-2aaaaaee2000 rwxp 2aaaaaede000 00:00 0 2aaaaaee2000-2aaaaaee9000 r-xp 00000000 08:01 315360 /usr/java/jdk1.6.0_14/jre/lib/amd64/jli/libjli.so 2aaaaaee9000-2aaaaafea000 ---p 00007000 08:01 315360 /usr/java/jdk1.6.0_14/jre/lib/amd64/jli/libjli.so 2aaaaafea000-2aaaaafec000 rwxp 00008000 08:01 315360 /usr/java/jdk1.6.0_14/jre/lib/amd64/jli/libjli.so 2aaaaafec000-2aaaaafee000 r-xp 00000000 08:01 49240 /lib64/libdl-2.7.so 2aaaaafee000-2aaaab1ee000 ---p 00002000 08:01 49240 /lib64/libdl-2.7.so 2aaaab1ee000-2aaaab1ef000 r-xp 00002000 08:01 49240 /lib64/libdl-2.7.so 2aaaab1ef000-2aaaab1f0000 rwxp 00003000 08:01 49240 /lib64/libdl-2.7.so 2aaaab1f0000-2aaaab1f1000 rwxp 2aaaab1f0000 00:00 0 2aaaab1f1000-2aaaab33e000 r-xp 00000000 08:01 49219 /lib64/libc-2.7.so 2aaaab33e000-2aaaab53e000 ---p 0014d000 08:01 49219 /lib64/libc-2.7.so 2aaaab53e000-2aaaab542000 r-xp 0014d000 08:01 49219 /lib64/libc-2.7.so 2aaaab542000-2aaaab543000 rwxp 00151000 08:01 49219 /lib64/libc-2.7.so 2aaaab543000-2aaaab549000 rwxp 2aaaab543000 00:00 0 2aaaab549000-2aaaabca7000 r-xp 00000000 08:01 315371 /usr/java/jdk1.6.0_14/jre/lib/amd64/server/libjvm.so 2aaaabca7000-2aaaabda6000 ---p 0075e000 08:01 315371 /usr/java/jdk1.6.0_14/jre/lib/amd64/server/libjvm.so 2aaaabda6000-2aaaabf1e000 rwxp 0075d000 08:01 315371 /usr/java/jdk1.6.0_14/jre/lib/amd64/server/libjvm.so 2aaaabf1e000-2aaaabf5c000 rwxp 2aaaabf1e000 00:00 0 2aaaabf67000-2aaaabfe9000 r-xp 00000000 08:01 49263 /lib64/libm-2.7.so 2aaaabfe9000-2aaaac1e8000 ---p 00082000 08:01 49263 /lib64/libm-2.7.so 2aaaac1e8000-2aaaac1e9000 r-xp 00081000 08:01 49263 /lib64/libm-2.7.so 2aaaac1e9000-2aaaac1ea000 rwxp 00082000 08:01 49263 /lib64/libm-2.7.so 2aaaac1ea000-2aaaac1f2000 r-xp 00000000 08:01 49283 /lib64/librt-2.7.so 2aaaac1f2000-2aaaac3f1000 ---p 00008000 08:01 49283 /lib64/librt-2.7.so 2aaaac3f1000-2aaaac3f2000 r-xp 00007000 08:01 49283 /lib64/librt-2.7.so 2aaaac3f2000-2aaaac3f3000 rwxp 00008000 08:01 49283 /lib64/librt-2.7.so 2aaaac3f3000-2aaaac41c000 r-xp 00000000 08:01 315336 /usr/java/jdk1.6.0_14/jre/lib/amd64/libjava.so 2aaaac41c000-2aaaac51b000 ---p 00029000 08:01 315336 /usr/java/jdk1.6.0_14/jre/lib/amd64/libjava.so 2aaaac51b000-2aaaac522000 rwxp 00028000 08:01 315336 /usr/java/jdk1.6.0_14/jre/lib/amd64/libjava.so 2aaaac522000-2aaaac523000 ---p 2aaaac522000 00:00 0 2aaaac523000-2aaaac524000 rwxp 2aaaac523000 00:00 0 2aaaac52d000-2aaaac542000 r-xp 00000000 08:01 49265 /lib64/libnsl-2.7.so 2aaaac542000-2aaaac741000 ---p 00015000 08:01 49265 /lib64/libnsl-2.7.so 2aaaac741000-2aaaac742000 r-xp 00014000 08:01 49265 /lib64/libnsl-2.7.so 2aaaac742000-2aaaac743000 rwxp 00015000 08:01 49265 /lib64/libnsl-2.7.so 2aaaac743000-2aaaac745000 rwxp 2aaaac743000 00:00 0 2aaaac745000-2aaaac74c000 r-xp 00000000 08:01 315362 /usr/java/jdk1.6.0_14/jre/lib/amd64/native_threads/libhpi.so 2aaaac74c000-2aaaac84d000 ---p 00007000 08:01 315362 /usr/java/jdk1.6.0_14/jre/lib/amd64/native_threads/libhpi.so 2aaaac84d000-2aaaac84f000 rwxp 00008000 08:01 315362 /usr/java/jdk1.6.0_14/jre/lib/amd64/native_threads/libhpi.so 2aaaac84f000-2aaaac850000 rwxp 2aaaac84f000 00:00 0 2aaaac850000-2aaaac858000 rwxs 00000000 08:01 229379 /tmp/hsperfdata_jatten/32116 2aaaac85b000-2aaaac865000 r-xp 00000000 08:01 49269 /lib64/libnss_files-2.7.so 2aaaac865000-2aaaaca64000 ---p 0000a000 08:01 49269 /lib64/libnss_files-2.7.so 2aaaaca64000-2aaaaca65000 r-xp 00009000 08:01 49269 /lib64/libnss_files-2.7.so 2aaaaca65000-2aaaaca66000 rwxp 0000a000 08:01 49269 /lib64/libnss_files-2.7.so 2aaaaca66000-2aaaaca74000 r-xp 00000000 08:01 315358 /usr/java/jdk1.6.0_14/jre/lib/amd64/libzip.so 2aaaaca74000-2aaaacb76000 ---p 0000e000 08:01 315358 /usr/java/jdk1.6.0_14/jre/lib/amd64/libzip.so 2aaaacb76000-2aaaacb79000 rwxp 00010000 08:01 315358 /usr/java/jdk1.6.0_14/jre/lib/amd64/libzip.so 2aaaacb79000-2aaaacdea000 rwxp 2aaaacb79000 00:00 0 2aaaacdea000-2aaaafb7a000 rwxp 2aaaacdea000 00:00 0 2aaaafb7a000-2aaaafb84000 rwxp 2aaaafb7a000 00:00 0 2aaaafb84000-2aaaafc3a000 rwxp 2aaaafb84000 00:00 0 2aaaafc40000-2aaab1100000 rwxp 2aaaafc40000 00:00 0 2aaab1100000-2aaab5040000 rwxp 2aaab1100000 00:00 0 2aaab5040000-2aabc3040000 rwxp 2aaab5040000 00:00 0 2aac025a0000-2aaca8340000 rwxp 2aac025a0000 00:00 0 2aaca8340000-2aaca9040000 rwxp 2aaca8340000 00:00 0 2aaca9040000-2aaca904b000 rwxp 2aaca9040000 00:00 0 2aaca904b000-2aaca906a000 rwxp 2aaca904b000 00:00 0 2aaca906a000-2aaca98da000 rwxp 2aaca906a000 00:00 0 2aaca98da000-2aaca9ad4000 rwxp 2aaca98da000 00:00 0 2aaca9ad4000-2aacaa004000 rwxp 2aaca9ad4000 00:00 0 2aacaa004000-2aacaa00a000 rwxp 2aacaa004000 00:00 0 2aacaa00a000-2aacaa87b000 rwxp 2aacaa00a000 00:00 0 2aacaa87b000-2aacaaa76000 rwxp 2aacaa87b000 00:00 0 2aacaaa76000-2aacaaa81000 rwxp 2aacaaa76000 00:00 0 2aacaaa81000-2aacaaaa0000 rwxp 2aacaaa81000 00:00 0 2aacaaaa0000-2aacaaba0000 rwxp 2aacaaaa0000 00:00 0 2aacaaba0000-2aacaad36000 r-xs 02fb1000 08:01 315318 /usr/java/jdk1.6.0_14/jre/lib/rt.jar 2aacaad36000-2aacaaf36000 rwxp 2aacaad36000 00:00 0 2aacaaf36000-2aacaaf49000 r-xp 00000000 08:01 315349 /usr/java/jdk1.6.0_14/jre/lib/amd64/libnet.so 2aacaaf49000-2aacab04a000 ---p 00013000 08:01 315349 /usr/java/jdk1.6.0_14/jre/lib/amd64/libnet.so 2aacab04a000-2aacab04d000 rwxp 00014000 08:01 315349 /usr/java/jdk1.6.0_14/jre/lib/amd64/libnet.so 2aacab058000-2aacab05c000 r-xp 00000000 08:01 49268 /lib64/libnss_dns-2.7.so 2aacab05c000-2aacab25b000 ---p 00004000 08:01 49268 /lib64/libnss_dns-2.7.so 2aacab25b000-2aacab25c000 r-xp 00003000 08:01 49268 /lib64/libnss_dns-2.7.so 2aacab25c000-2aacab25d000 rwxp 00004000 08:01 49268 /lib64/libnss_dns-2.7.so 2aacab25d000-2aacab26e000 r-xp 00000000 08:01 49282 /lib64/libresolv-2.7.so 2aacab26e000-2aacab46e000 ---p 00011000 08:01 49282 /lib64/libresolv-2.7.so 2aacab46e000-2aacab46f000 r-xp 00011000 08:01 49282 /lib64/libresolv-2.7.so 2aacab46f000-2aacab470000 rwxp 00012000 08:01 49282 /lib64/libresolv-2.7.so 2aacab470000-2aacab572000 rwxp 2aacab470000 00:00 0 2aacab572000-2aacab57e000 r-xs 00081000 08:10 29851828 /mnt/home/jatten/workspace/common/lib/google-collect-1.0.jar 2aacab57e000-2aacab585000 r-xs 000aa000 08:10 29851946 /mnt/home/jatten/workspace/common/lib/mysql-connector-java-5.1.8-bin.jar 2aacab585000-2aacab58d000 r-xs 00028000 08:10 29851949 /mnt/home/jatten/workspace/common/lib/xml-apis.jar 2aacab58d000-2aacab591000 r-xs 0002f000 08:10 29851947 /mnt/home/jatten/workspace/common/lib/commons-beanutils-core-1.8.2.jar 2aacab591000-2aacab59e000 r-xs 0007f000 08:10 29851943 /mnt/home/jatten/workspace/common/lib/commons-collections-3.2.jar 2aacab59e000-2aacab5a3000 r-xs 00026000 08:10 29851942 /mnt/home/jatten/workspace/common/lib/httpcore-4.0.jar 2aacab5a3000-2aacab5a9000 r-xs 00030000 08:10 29851932 /mnt/home/jatten/workspace/common/lib/junit-dep-4.8.1.jar 2aacab5a9000-2aacab5ac000 r-xs 00011000 08:10 29851922 /mnt/home/jatten/workspace/common/lib/servlet.jar 2aacab5ac000-2aacab5ae000 r-xs 00009000 08:10 29851937 /mnt/home/jatten/workspace/common/lib/gsb.jar 2aacab5ae000-2aacab5b5000 r-xs 00059000 08:10 29851930 /mnt/home/jatten/workspace/common/lib/log4j-1.2.15.jar 2aacab5b5000-2aacab6b5000 rwxp 2aacab5b5000 00:00 0 2aacab6b5000-2aacab6b7000 r-xs 00009000 08:10 29851956 /mnt/home/jatten/workspace/common/lib/gsb-src.jar 2aacab6b7000-2aacab7b7000 rwxp 2aacab6b7000 00:00 0 2aacab7b7000-2aacab7cf000 r-xs 00115000 08:10 29851938 /mnt/home/jatten/workspace/common/lib/xercesImpl.jar 2aacab7cf000-2aacab7d1000 r-xs 00009000 08:10 29851957 /mnt/home/jatten/workspace/common/lib/velocity-tools-view-1.0.jar 2aacab7d1000-2aacab7d3000 r-xs 00009000 08:10 29851939 /mnt/home/jatten/workspace/common/lib/commons-cli-1.2.jar 2aacab7d3000-2aacab7d9000 r-xs 00034000 08:10 29851955 /mnt/home/jatten/workspace/common/lib/junit-4.8.1.jar 2aacab7d9000-2aacab7db000 r-xs 0000e000 08:10 29851917 /mnt/home/jatten/workspace/common/lib/jakarta-oro-2.0.8.jar 2aacab7db000-2aacab858000 r-xs 0031d000 08:10 29851916 /mnt/home/jatten/workspace/common/lib/poi-ooxml-schemas-3.6-20091214.jar 2aacab858000-2aacab85c000 r-xs 00028000 08:10 29851936 /mnt/home/jatten/workspace/common/lib/httpcore-nio-4.0.jar 2aacab85c000-2aacab85e000 r-xs 00005000 08:10 29851940 /mnt/home/jatten/workspace/common/lib/commons-beanutils-bean-collections-1.8.2.jar 2aacab85e000-2aacab864000 r-xs 00059000 08:10 29851919 /mnt/home/jatten/workspace/common/lib/mail-1.4.jar 2aacab864000-2aacab866000 r-xs 0000d000 08:10 29851950 /mnt/home/jatten/workspace/common/lib/commons-logging-1.1.1.jar 2aacab866000-2aacab86c000 r-xs 00045000 08:10 29851924 /mnt/home/jatten/workspace/common/lib/commons-httpclient-3.1.jar 2aacab86c000-2aacab877000 r-xs 00074000 08:10 29851931 /mnt/home/jatten/workspace/common/lib/velocity-dep-1.4.jar 2aacab877000-2aacab87f000 r-xs 00051000 08:10 29851954 /mnt/home/jatten/workspace/common/lib/velocity-1.4.jar 2aacab87f000-2aacab884000 r-xs 00034000 08:10 29851958 /mnt/home/jatten/workspace/common/lib/commons-beanutils-1.8.2.jar 2aacab884000-2aacab889000 r-xs 00048000 08:10 29851918 /mnt/home/jatten/workspace/common/lib/dom4j-1.6.1.jar 2aacab889000-2aacab8c6000 r-xs 0024f000 08:10 29851914 /mnt/home/jatten/workspace/common/lib/xmlbeans-2.3.0.jar 2aacab8c6000-2aacab8cb000 r-xs 00033000 08:10 29851929 /mnt/home/jatten/workspace/common/lib/xmemcached-1.2.3.jar 2aacab8cb000-2aacab8cd000 r-xs 00005000 08:10 29851928 /mnt/home/jatten/workspace/common/lib/org.hamcrest.core_1.1.0.v20090501071000.jar 2aacab8cd000-2aacab8d0000 r-xs 0000a000 08:10 29851944 /mnt/home/jatten/workspace/common/lib/persistence-api-1.0.jar 2aacab8d0000-2aacab8d6000 r-xs 0005f000 08:10 29851926 /mnt/home/jatten/workspace/common/lib/poi-ooxml-3.6-20091214.jar 2aacab8d6000-2aacab8d7000 r-xs 0002b000 08:10 29851951 /mnt/home/jatten/workspace/common/lib/maxmind.jar 2aacab8d7000-2aacab8d8000 r-xs 00002000 08:10 29851935 /mnt/home/jatten/workspace/common/lib/jackson-jaxrs-1.2.0.jar 2aacab8d8000-2aacab8d9000 r-xs 00002000 08:10 29851913 /mnt/home/jatten/workspace/common/lib/slf4j-log4j12-1.5.6.jar 2aacab8d9000-2aacab8dd000 r-xs 00025000 08:10 29851945 /mnt/home/jatten/workspace/common/lib/yanf4j-1.1.1.jar 2aacab8dd000-2aacab8df000 r-xs 00003000 08:10 29851952 /mnt/home/jatten/workspace/common/lib/clickstream-1.0.2.jar 2aacab8df000-2aacab8e1000 r-xs 00004000 08:10 29851953 /mnt/home/jatten/workspace/common/lib/slf4j-api-1.5.6.jar 2aacab8e1000-2aacab8e9000 r-xs 0004d000 08:10 29851920 /mnt/home/jatten/workspace/common/lib/jackson-mapper-asl-1.2.0.jar 2aacab8e9000-2aacab8ed000 r-xs 0001f000 08:10 29851925 /mnt/home/jatten/workspace/common/lib/jackson-core-asl-1.2.0.jar 2aacab8ed000-2aacab8f1000 r-xs 0001b000 08:10 29851912 /mnt/home/jatten/workspace/common/lib/oscache-2.3.jar 2aacab8f1000-2aacab90c000 r-xs 0015d000 08:10 29851927 /mnt/home/jatten/workspace/common/lib/poi-3.6-20091214.jar 2aacab90c000-2aacab911000 r-xs 00040000 08:10 29851831 /mnt/home/jatten/workspace/common/lib/commons-lang-2.5.jar 2aacab911000-2aacab914000 r-xs 00012000 08:10 29851923 /mnt/home/jatten/workspace/common/lib/jgooglesafebrowser-0.1a.2.jar 2aacab914000-2aacab918000 r-xs 00023000 08:10 29851933 /mnt/home/jatten/workspace/common/lib/gson-1.3.jar 2aacab918000-2aacabb18000 rwxp 2aacab918000 00:00 0 2aacabb82000-2aacabd82000 rwxp 2aacabb82000 00:00 0 2aacabe05000-2aacaf204000 rwxp 2aacabe05000 00:00 0 7fffaa12a000-7fffaa141000 rwxp 7fffaa12a000 00:00 0 [stack] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vdso] VM Arguments: jvm_args: -Xmx8000M java_command: com.scorers.ModelImplementingPageScorer -t data/data/golds/adult.all.json -b 18 -s data/models/pagetext.binary. adult.april6.all.model -m com.models.MultiClassUpdateableModel -p 30 --goldsilver -v --cat adult --fakeinput -e /mnt/tmp/xyz.15647.pageo bjects.txt -o Launcher Type: SUN_STANDARD Environment Variables: JAVA_HOME=/usr/java/jdk1.6.0_14 PATH=/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/jatten/bin LD_LIBRARY_PATH=/usr/java/jdk1.6.0_14/jre/lib/amd64/server:/usr/java/jdk1.6.0_14/jre/lib/amd64:/usr/java/jdk1.6.0_14/jre/../lib/amd64 SHELL=/bin/bash Signal Handlers: SIGSEGV: [libjvm.so+0x6bd980], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGBUS: [libjvm.so+0x6bd980], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGFPE: [libjvm.so+0x594cc0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGPIPE: [libjvm.so+0x594cc0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGXFSZ: [libjvm.so+0x594cc0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGILL: [libjvm.so+0x594cc0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000 SIGUSR2: [libjvm.so+0x597480], sa_mask[0]=0x00000000, sa_flags=0x10000004 SIGHUP: [libjvm.so+0x5971d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGINT: [libjvm.so+0x5971d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGTERM: [libjvm.so+0x5971d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 SIGQUIT: [libjvm.so+0x5971d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004 --------------- S Y S T E M --------------- OS:Fedora release 8 (Werewolf) uname:Linux 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:34:28 EST 2008 x86_64 libc:glibc 2.7 NPTL 2.7 rlimit: STACK 10240k, CORE 0k, NPROC 61504, NOFILE 1024, AS infinity load average:2.83 2.73 2.78 CPU:total 2 (4 cores per cpu, 1 threads per core) family 6 model 23 stepping 10, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1 Memory: 4k page, physical 7872040k(14540k free), swap 0k(0k free) vm_info: Java HotSpot(TM) 64-Bit Server VM (14.0-b16) for linux-amd64 JRE (1.6.0_14-b08), built on May 21 2009 01:11:11 by "java_re" with gcc 3.2.2 (SuSE Lin ux) [error occurred during error reporting (printing date and time), id 0xb]

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  • Pan point on Google Map to specific pixel position on screen (API v3)

    - by Jake
    When overlay is a Google maps overlay and offsetx, offsety is the pixel distance from the maps center that I want to pan latlong to, the following works. var projection = overlay.getProjection(); var pxlocation = projection.fromLatLngToContainerPixel(latlong); map.panTo(projection.fromContainerPixelToLatLng(new google.maps.Point(pxlocation.x+offsetx,pxlocation.y+offsety))); However, I don't always have an overlay on the map and map.getProjection() returns a projection, not a MapCanvasProjection which does not have the methods I need. Is there a way to do this without making an overlay specificaly for it?

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  • MP3 Encoding in Java

    - by Mohit Nanda
    I need an OpenSource API in Java, which can encode *.wav and *.au formats to MP3, and vice-versa. Have evaluated Java Sound API, and LameOnJ, but they dont meet the requirements and aint stable, respectively. Please suggest one that is free, and platform independent.

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  • Using Gdata Calendar API for PHP App to create a calender system with event ownership

    - by linuxlover101
    Hello, I'm working on a PHP app, and I'm trying to find the best way to set up a calendar system. First let me describe the intended function of the system: The application has multiple users who can login simultaneously. Each user should be able to add their own events and display them on their "profile." Also, on another page, the events should be able to be shown all together (from all users) and from each individual users exclusively. Since Google Calendar has a nice calendar-looking interface, I thought I would work with the GData APIs. Originally, I thought this would make things easier. But then it seems that if I want to represent event ownership, either each user would have to have a google account or somehow they all would each have to have a separate calendar. Thus, the application would have to create the calendar (if it does not exist) and be able to edit only their calendar. Two questions: Can I somehow use the GData APIs to accomplish my goal? (Mainly event ownership.) Should I just create my own calendar like application? Thanks!

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  • BlueCove failing to associate with Bluetooth device in Java.

    - by user243680
    I am getting the following error when i try to use a blue tooth dongle to transfer a video file from pc to mobile phone. does anyone know run: BlueCove log redirected to log4j log4j:WARN No appenders could be found for logger (com.intel.bluetooth). log4j:WARN Please initialize the log4j system properly. BlueCove version 2.1.0 on bluesoleil java.io.IOException: Device not discovered BlueCove stack shutdown completed at com.intel.bluetooth.BluetoothStackBlueSoleil.connectionRfOpenClientConnection(BluetoothStackBlueSoleil.java:361) at com.intel.bluetooth.BluetoothRFCommClientConnection.<init>(BluetoothRFCommClientConnection.java:37) at com.intel.bluetooth.MicroeditionConnector.openImpl(MicroeditionConnector.java:379) at com.intel.bluetooth.MicroeditionConnector.open(MicroeditionConnector.java:162) at javax.microedition.io.Connector.open(Connector.java:83) at de.avetana.obexsolo.OBEXConnector.open(OBEXConnector.java:103) at OBEXTest.main(OBEXTest.java:23)

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  • youtube python api gdata.service. requesterror

    - by nashr rafeeg
    i have the following code which is trying to add a set of videos into a youtube play list import urllib,re import gdata.youtube import gdata.youtube.service class reddit(): def __init__(self, rssurl ='http://www.reddit.com/r/chillmusic.rss' ): self.URL = rssurl self._downloadrss() def _downloadrss(self): if self.URL.endswith('.rss'): # Downloadd the RSS feed of the subreddit - save as "feed.rss" try: print "Downloading rss from reddit..." urllib.urlretrieve (URL, "feed.rss") except Exception as e: print e def clean(self): playList = open("feed.rss").read() links = re.findall(r'(http?://www.youtube.com\S+)', playList) for link in links: firstPass = link.replace('&quot;&gt;[link]&lt;/a&gt;', '') secondPass = firstPass.replace('&amp;amp;fmt=18', '') thirdpass = secondPass.replace('&amp;amp;feature=related', '') finalPass = thirdpass.replace('http://www.youtube.com/watch?v=', '') print thirdpass, "\t Extracted: ", finalPass return finalPass class google(): def __init__(self, username, password): self.Username = username self.password = password #do not change any of the following self.key = 'AI39si5DDjGYhG_1W-8n_amjgEjbOU27sa0aw2RQI5gOaoK5KqCD2Fzffbkh8oqGu7CqFQLLQ7N7wK0gz7lrTQbd70srC72Niw' self.appname = 'Reddit playlist maker' self.service = gdata.youtube.service.YouTubeService() def authenticate(self): self.service.email = self.Username self.service.password = self.password self.service.developer_key = self.key self.service.client_id = self.appname self.service.source = self.appname self.service.ssl = False self.service.ProgrammaticLogin() def get_playlists(self): y_playlist = self.service.GetYouTubePlaylistFeed(username='default') l = [] k = [] for p in y_playlist.entry: k=[] k=[p.link[1].href, p.title.text] l.append(k) return l def get_playlist_id_from_url(self, href): #quick and dirty method to get the playList id's return href.replace('http://www.youtube.com/view_play_list?p=','') def creat_playlist(self, name="Reddit list", disc ="videos from reddit"): playlistentry = self.service.AddPlaylist(name, disc) if isinstance(playlistentry, gdata.youtube.YouTubePlaylistEntry): print 'New playlist added' return playlistentry.link[1].href def add_video_to_playlist(self,playlist_uri,video): video_entry = self.service.AddPlaylistVideoEntryToPlaylist( playlist_uri, video) if isinstance(video_entry, gdata.youtube.YouTubePlaylistVideoEntry): print 'Video added' URL = "http://www.reddit.com/r/chillmusic.rss" r = reddit(URL) g = google('[email protected]', 'xxxx') g.authenticate() def search_playlist(playlist="Reddit list3"): pl_id = None for pl in g.get_playlists(): if pl[1] == playlist: pl_id = pl[0] print pl_id break if pl_id == None: pl_id = g.creat_playlist(name=playlist) return pl_id pls = search_playlist() for video_id in r.clean(): g.add_video_to_playlist(pls, video_id) when i run the code i am geting the following error message gdata.service.RequestError: {'status': 303, 'body': '', 'reason': 'See Other'} any one have any idea why i am getting this error cheers Nash

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  • org.apache.jasper.JasperException: java.lang.NullPointerException

    - by Br3x
    i got this exception everytime i try to load my webapp: exception org.apache.jasper.JasperException: java.lang.NullPointerException org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:538) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) root cause java.lang.NullPointerException org.apache.jsp.index_jsp._jspInit(index_jsp.java:22) org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52) org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:164) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) how can i solve this exception?

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  • gdata youtube api 302 'The document has moved'

    - by zalew
    I'm trying to get YouTube feeds with the python gdata library. Authentication features work ok, yt_service.ProgrammaticLogin() works, generating subauth token works, etc., but when I try to get some feeds (GetMostRecentVideoFeed, GetYouTubeVideoEntry, even GetFeed, and any other) I get: RequestError: {'status': 302, 'body': '<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">\n<TITLE>302 Moved</TITLE></HEAD><BODY>\n<H1>302 Moved</H1>\nThe document has moved\n<A HREF="http://www.google.com">here</A>.\r\n</BODY></HTML>\r\n', 'reason': 'Redirect received, but redirects_remaining <= 0'} 302 to 'google.com'??? I've even tried to do something from the google online tutorials and I get the same error. What's going on?

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  • Google Maps iPhone API Terrain View

    - by Adam
    We're using MapKit on an iPhone app to display a Google Map with terrain view. However, the terrain view only shows when the user has an active Internet connection, the moment the user's Internet is off, the terrain on the map disappears and it appears flat. Is there any way to keep the terrain view on even when the user isn't on an active internet connection? Thanks! Adam

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  • Twitter API, Twitter4J, Bounding Boxes, stream by location

    - by Aidan
    Hey guys, I've started a streamer via Twitter4J and I'm consuming tweets with certain keywords currently. I'd like to only get tweets within a certain location e.g within a certain country. I understand bounding boxes will do this? But I don't know how I'd implement them within twitter4J. Does anyone know? Thanks!

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  • Google Place API marker issue

    - by user2959740
    I am creating itinerary planner like http://www.plnnr.com I want to create Google Place marker by direction(North,East,west,south) for e.g. When people select 4 day it should show attraction for 1st day all north location 2nd day east location then south and west. How to i do the auto marker. I am not sure how plnnr.com works how they are generating the lines based on direction. Please anyone help me on this.

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  • Java: Best practices for turning foreign horror-code into clean API...?

    - by java.is.for.desktop
    Hello, everyone! I have a project (related to graph algorithms). It is written by someone else. The code is horrible: public fields, no getters/setters huge methods, all public some classes have over 20 fields some classes have over 5 constructors (which are also huge) some of those constructors just left many fields null (so I can't make some fields final, because then every second constructor signals errors) methods and classes rely on each other in both directions I have to rewrite this into a clean and understandable API. Problem is: I myself don't understand anything in this code. Please give me hints on analyzing and understanding such code. I was thinking, perhaps, there are tools which perform static code analysis and give me call graphs and things like this.

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  • Java 8 Stream, getting head and tail

    - by lyomi
    Java 8 introduced a Stream class that resembles Scala's Stream, a powerful lazy construct using which it is possible to do something like this very concisely: def from(n: Int): Stream[Int] = n #:: from(n+1) def sieve(s: Stream[Int]): Stream[Int] = { s.head #:: sieve(s.tail filter (_ % s.head != 0)) } val primes = sieve(from(2)) primes takeWhile(_ < 1000) print // prints all primes less than 1000 I wondered if it is possible to do this in Java 8, so I wrote something like this: IntStream from(int n) { return IntStream.iterate(n, m -> m + 1); } IntStream sieve(IntStream s) { int head = s.findFirst().getAsInt(); return IntStream.concat(IntStream.of(head), sieve(s.skip(1).filter(n -> n % head != 0))); } IntStream primes = sieve(from(2)); PrimitiveIterator.OfInt it = primes.iterator(); for (int prime = it.nextInt(); prime < 1000; prime = it.nextInt()) { System.out.println(prime); } Fairly simple, but it produces java.lang.IllegalStateException: stream has already been operated upon or closed because both findFirst() and skip() is a terminal operation on Stream which can be done only once. I don't really have to use up the stream twice since all I need is the first number in the stream and the rest as another stream, i.e. equivalent of Scala's Stream.head and Stream.tail. Is there a method in Java 8 Stream that I can achieve this? Thanks.

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  • Google Maps API v3 - Directions/Paths breaking KML Overlay Infowindows

    - by Douglas
    I'm in the end stages before content filling and then production on the Google Maps project I've been working on. A number of bugs and such have been thwarted, but this latest one has me relatively stumped. The demo map can be viewed here: http://dougglover.com/samples/finalProduct/ Everything works fine until you create a path using the Directions section(not to be confused with Get Directions). To reproduce the problem, play around with the map, click on a building or two, just to see the functionality. After ensuring that clicking on a building works(brings up an infowindow), choose two buildings to get directions to in the Directions area. It works great with the routing algorithm I've implemented, and the paths show up nicely, and intelligently. The problem being that you can't click buildings anymore to see their info. I'm assuming it has something to do with the z-index error popping up in the console, but I'm not sure how to handle that if it is the problem. Any guidance is greatly appreciated. :)

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  • Recommendations for java captcha libraries

    - by skaffman
    I'm looking for a replacement for JCaptcha, which doesn't seem to be maintained any more, and isn't very good to begin with. The replacement has to integrate nicely with JavaEE webapps. As I can see it, there are three options: JCaptcha - No longer maintained, crude API SimpleCaptcha - much nicer API, nicer captchas, but seems to be Java6 only ReCaptcha - easy to use, uses remote web-service to generate captchas, but not much control over look and feel Has anyone used any others, that they'd recommend?

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  • Error compiling basic java code

    - by Michael Younani
    New to java. Practicing coding by following a book. Heres my code: class Motorcycle { //Three instance variables - make and color are strings. while a boolean refers to TRUE OR FLASE(in this case off or on) String make; String color; boolean engineState; void startEngine() { if (engineState == true) System.out.print("The engine is already on."); else { engineState = true; System.out.print("The engine is now on."); } void showAtts() { System.out.print("This motorcycle is a " + color + " " + make); if (engineState ==true) System.out.print("The engine is on."); else System.out.print("The engine is off."); } } } When I compile I get 2 errors: 1) illegal start of expression 2) ; expected I can't pin point the problem. If anyone can direct me or hint me please do.

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  • google calendar java api

    - by tommaso
    Hello, I have an object of CalendarEntry I know that http://www.google.com/calendar/feeds/[email protected]/allcalendars/full is the feed url of all calendars but how I can get this feed url from CalendarEntry instance? Because I wanna post a new entry in a specified calendar and I need this url. Thanks!

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  • facescontext.getcurrentinstance returns nullpointerexception

    - by mvg
    I am creating a Spring based JSF application, where I am getting FacesContext.getCurrentInstance which returns null. Here is my Java code public static ServletContext getServletContext() { return (ServletContext) FacesContext.getCurrentInstance() .getExternalContext().getContext(); } This is the stack trace of my error SEVERE: Exception sending context initialized event to listener instance of class org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dbSettingsServiceTarget' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.baytalkitec.smartcall.service.impl.DbSettingsServiceImpl]: Constructor threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:883) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:839) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409) at java.security.AccessController.doPrivileged(Native Method) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.baytalkitec.smartcall.service.impl.DbSettingsServiceImpl]: Constructor threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:115) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:61) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:877) ... 31 more Caused by: java.lang.NullPointerException at com.smartcall.util.FacesUtil.getServletContext(FacesUtil.java:21) at com.smartcall.util.SpringApplicationContextUtil.init(SpringApplicationContextUtil.java:21) at com.smartcall.util.SpringApplicationContextUtil.<init>(SpringApplicationContextUtil.java:16) at com.smartcall.service.impl.DbSettingsServiceImpl.init(DbSettingsServiceImpl.java:17) at com.smartcall.service.impl.DbSettingsServiceImpl.<init>(DbSettingsServiceImpl.java:12) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100) ... 33 more and hence due to this error Server console in Eclipse reports that application failed to startup due to previous errors My web.xml file <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>smartcall2.0</display-name> <context-param> <param-name>javax.faces.STATE_SAVING_METHOD</param-name> <param-value>server</param-value> </context-param> <context-param> <param-name>javax.faces.CONFIG_FILES</param-name> <param-value> /WEB-INF/faces-config.xml,/WEB-INF/faces-managed-bean.xml,/WEB-INF/faces-navigation.xml </param-value> </context-param> <listener> <listener-class> com.sun.faces.config.ConfigureListener </listener-class> </listener> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <filter> <display-name>RichFaces Filter</display-name> <filter-name>richfaces</filter-name> <filter-class>org.ajax4jsf.Filter</filter-class> </filter> <filter-mapping> <filter-name>richfaces</filter-name> <servlet-name>Faces Servlet</servlet-name> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> </filter-mapping> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <context-param> <param-name>javax.faces.DEFAULT_SUFFIX</param-name> <param-value>.xhtml</param-value> </context-param> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.jsf</url-pattern> </servlet-mapping> <session-config> <session-timeout>180</session-timeout> </session-config> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> I am not clear whether this error belongs to Spring or JSF or Eclipse. I am using Eclipse Galileo, JSF 1.2,Spring 3 Please help Thanks in advance

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  • Very basic running of drools 5, basic setup and quickstart

    - by Berlin Brown
    Is there a more comprehensive quick start for drools 5. I was attempting to run the simple Hello World .drl rule but I wanted to do it through an ant script, possibly with just javac/java: I get the following error: Note: I don't am running completely without Eclipse or any other IDE: Is there a more comprehensive quick start for drools 5. I was attempting to run the simple Hello World .drl rule but I wanted to do it through an ant script, possibly with just javac/java: I get the following error: Note: I don't am running completely without Eclipse or any other IDE: test: [java] Exception in thread "main" org.drools.RuntimeDroolsException: Unable to load d ialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule .builder.dialect.java.JavaDialectConfiguration' [java] at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuild erConfiguration.java:274) [java] at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurati onMap(PackageBuilderConfiguration.java:259) [java] at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConf iguration.java:176) [java] at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderCo nfiguration.java:153) [java] at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242) [java] at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:142) [java] at org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnowledgeBuilde r(KnowledgeBuilderProviderImpl.java:29) [java] at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(Knowledg eBuilderFactory.java:29) [java] at org.berlin.rpg.rules.Rules.rules(Rules.java:33) [java] at org.berlin.rpg.rules.Rules.main(Rules.java:73) [java] Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath [java] at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompil er(JavaDialectConfiguration.java:94) [java] at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(Java DialectConfiguration.java:55) [java] at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuild erConfiguration.java:270) [java] ... 9 more [java] Java Result: 1 ... ... I do include the following libraries with my javac and java target: <path id="classpath"> <pathelement location="${lib.dir}" /> <pathelement location="${lib.dir}/drools-api-5.0.1.jar" /> <pathelement location="${lib.dir}/drools-compiler-5.0.1.jar" /> <pathelement location="${lib.dir}/drools-core-5.0.1.jar" /> <pathelement location="${lib.dir}/janino-2.5.15.jar" /> </path> Here is the Java code that is throwing the error. I commented out the java.compiler code, that didn't work either. public void rules() { /* final Properties properties = new Properties(); properties.setProperty( "drools.dialect.java.compiler", "JANINO" ); PackageBuilderConfiguration cfg = new PackageBuilderConfiguration( properties ); JavaDialectConfiguration javaConf = (JavaDialectConfiguration) cfg.getDialectConfiguration( "java" ); */ final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); // this will parse and compile in one step kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl", Rules.class), ResourceType.DRL); // Check the builder for errors if (kbuilder.hasErrors()) { System.out.println(kbuilder.getErrors().toString()); throw new RuntimeException("Unable to compile \"HelloWorld.drl\"."); } // Get the compiled packages (which are serializable) final Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages(); // Add the packages to a knowledgebase (deploy the knowledge packages). final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(pkgs); final StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); ksession.setGlobal("list", new ArrayList<Object>()); ksession.addEventListener(new DebugAgendaEventListener()); ksession.addEventListener(new DebugWorkingMemoryEventListener()); // Setup the audit logging KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "log/helloworld"); final Message message = new Message(); message.setMessage("Hello World"); message.setStatus(Message.HELLO); ksession.insert(message); ksession.fireAllRules(); logger.close(); ksession.dispose(); } ... Here I don't think Ant is relevant because I have fork set to true: <target name="test" depends="compile"> <java classname="org.berlin.rpg.rules.Rules" fork="true"> <classpath refid="classpath.rt" /> <classpath> <pathelement location="${basedir}" /> <pathelement location="${build.classes.dir}" /> </classpath> </java> </target> The error is thrown at line 1. Basically, I haven't done anything except call final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); I am running with Windows XP, Java6, and within Ant.1.7. The most recent (as of yesterday) version 5 of Drools-Rules.

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