add busy-java-threads.sh and find-in-jars.sh

Author: oldratlee

README.md

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+useful-shells
+==================
+
+把平时有用的手动操作做成脚本，这样可以便捷的使用。
+
+busy-java-threads.sh
+=======================
+
+在排查`Java`的`CPU`性能问题时，需要找到消耗`CPU`的线程，查看它的线程栈。
+
+这个脚本的功能是，打印出在运行的`Java`进程中，消耗`CPU`最多的那5个线程的线程栈。  
+
+示例：
+
+```bash
+$ ./busy-java-threads.sh 
+The stack of busy(0.0%) thread(30509/0x772d) of java process(29213) of user(foo):
+"Attach Listener" daemon prio=10 tid=0x0000000042171800 nid=0x772d waiting on condition [0x0000000000000000]
+   java.lang.Thread.State: RUNNABLE
+
+The stack of busy(0.0%) thread(29230/0x722e) of java process(29213) of user(foo):
+"GC Daemon" daemon prio=10 tid=0x00007f21340ec800 nid=0x722e in Object.wait() [0x00007f2133ae3000]
+   java.lang.Thread.State: TIMED_WAITING (on object monitor)
+	at java.lang.Object.wait(Native Method)
+	- waiting on <0x00000000a0000120> (a sun.misc.GC$LatencyLock)
+	at sun.misc.GC$Daemon.run(GC.java:100)
+	- locked <0x00000000a0000120> (a sun.misc.GC$LatencyLock)
+	
+	...
+```
+
+
+find-in-jars.sh
+===================
+
+在当前目录下所有`Jar`文件里，查找文件名。
+
+用法：
+
+```bash
+find-in-jars.sh 'sofa\.properties'
+find-in-jars.sh log4j\\.xml
+find-in-jars.sh 'log4j\.properties|log4j\.xml'
+```
+
+注意，后面Pattern是`grep`的扩展正则表达式。
+
+示例：
+
+```bash
+$ ./find-in-jars '*Service.class'
+./spring-2.5.6.SEC03.jar!org/springframework/stereotype/Service.class
+./rpc-benchmark-0.0.1-SNAPSHOT.jar!com/taobao/rpc/benchmark/service/HelloService.class
+```
+
+说明详见：[在多个Jar(Zip)文件查找Log4J配置文件的Shell命令行](http://oldratlee.com/458/tech/shell/find-file-in-jar-zip-files.html)

busy-java-threads.sh

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+#!/bin/bash
+# @Function
+# Find the High cpu consume thread of java, and print the stack of these threads.
+#
+# @Usage
+# 	$ ./busy-java-threads.sh
+#
+# @author Jerry Lee
+
+redEcho()
+{
+    echo -e "\033[1;31m$@\033[0m"
+}
+
+uuid=`date +%s`_${RANDOM}_$$
+
+ps -Leo pid,lwp,user,comm,pcpu --no-headers | awk '$4=="java"{print $0}' |
+sort -k5 -r -n | head -5 | while read threadLine ; do
+        pid=`echo ${threadLine} | awk '{print $1}'`
+        threadId=`echo ${threadLine} | awk '{print $2}'`
+        threadId0x=`printf %x ${threadId}`
+        user=`echo ${threadLine} | awk '{print $3}'`
+        pcpu=`echo ${threadLine} | awk '{print $5}'`
+        
+        jstackFile=/tmp/${uuid}_${pid}
+        
+        [ ! -f "${jstackFile}" ] &&
+        {
+            jstack ${pid} > ${jstackFile} ||
+            { redEcho "Fail to jstack java process ${pid}"; rm ${jstackFile} ; continue; }
+        }
+        
+        redEcho "The stack of busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) of java process(${pid}) of user(${user}):"
+        sed "/nid=0x${threadId0x}/,/^$/p" -n ${jstackFile}
+done
+
+rm /tmp/${uuid}_*

find-in-jars.sh

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+#!/bin/bash
+# @Function
+# Find file in the jar files under current directory
+#
+# @Usage
+# 	$ find-in-jars.sh log4j\\.xml
+# 	$ find-in-jars.sh 'log4j\.properties'
+# 	$ find-in-jars.sh 'log4j\.properties|log4j\.xml'
+#
+# @author Jerry Lee
+
+[ -z "$1" ] && { echo No find file pattern! ; exit 1; }  
+
+find -iname '*.jar' | while read jarFile
+do
+        jar tf ${jarFile} | egrep $1 | while read file
+        do
+                echo "${jarFile}"\!"${file}"
+        done
+done