btrace示例

偷个懒，写在一个btrace脚本中了……得空再拆成多个用例

示例代码

被测试的类

package com.yl.btraceDemo.impl;import javax.jws.WebService;@WebServicepublic class DemoInfImpl {    public int add(int firstParam, int secondParam) {        int result =firstParam+secondParam;        System.err.println("add result:"+result);        return result;    }    public int sub(int firstParam, int secondParam) {        int result =firstParam-secondParam;        System.err.println("sub result:"+result);        return result;    }}

测试主类如下

package com.yl.btraceDemo.main;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.util.logging.Level;import java.util.logging.Logger;import com.yl.btraceDemo.impl.DemoInfImpl;public class TestMain {    private static InputStreamReader isr;    public static void main(String[] args) {        enterKey();        DemoInfImpl demoInfImpl = new DemoInfImpl();        demoInfImpl.add(1, 2);        demoInfImpl.sub(2, -1);        logTracer();        testFile();        demoInfImpl.add(1, 2);        try {            Thread.sleep(10*1000);        } catch (InterruptedException e) {            e.printStackTrace();        }        runtimeException();    }    public static void enterKey() {        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));        try {            bf.readLine();        } catch (IOException e) {            e.printStackTrace();        }    }    public static void logTracer() {        Logger log = Logger.getLogger("com.yl.btraceDemo");        log.setLevel(Level.INFO);        log.info("info Level");        log.setLevel(Level.WARNING);        log.info("WARNING Level");    }    public static void runtimeException() {        try {            throw new RuntimeException();        } catch (Exception e) {            e.printStackTrace();        } finally {        }    }    public static void testFile() {        File file = new File("d:\\", "addfile.txt");        try {            file.createNewFile(); //        } catch (IOException e) {            e.printStackTrace();        }        String str = "welcome";        byte bt[] = new byte[1024];        bt = str.getBytes();        try {            FileOutputStream in = new FileOutputStream(file);            try {                in.write(bt, 0, bt.length);                in.close();                // boolean success=true;            } catch (IOException e) {                e.printStackTrace();            }        } catch (FileNotFoundException e) {            e.printStackTrace();        }        FileInputStream out = null;        try {            out = new FileInputStream(file);            isr = new InputStreamReader(out);            int ch = 0;            while ((ch = isr.read()) != -1) {                System.out.print((char) ch);            }        } catch (Exception e) {        } finally {            try {                out.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

btrace脚本如下

package com.yl.btraceDemo.scripts;import static com.sun.btrace.BTraceUtils.classOf;import static com.sun.btrace.BTraceUtils.concat;import static com.sun.btrace.BTraceUtils.currentThread;import static com.sun.btrace.BTraceUtils.field;import static com.sun.btrace.BTraceUtils.get;import static com.sun.btrace.BTraceUtils.jstack;import static com.sun.btrace.BTraceUtils.printFields;import static com.sun.btrace.BTraceUtils.printNumberMap;import static com.sun.btrace.BTraceUtils.println;import static com.sun.btrace.BTraceUtils.runFinalization;import static com.sun.btrace.BTraceUtils.str;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.lang.reflect.Field;import java.util.Map;import java.util.concurrent.atomic.AtomicInteger;import java.util.logging.LogRecord;import java.util.logging.Logger;import com.sun.btrace.BTraceUtils.Atomic;import com.sun.btrace.BTraceUtils.Collections;import com.sun.btrace.BTraceUtils.Reflective;import com.sun.btrace.BTraceUtils.Strings;import com.sun.btrace.BTraceUtils.Threads;import com.sun.btrace.annotations.BTrace;import com.sun.btrace.annotations.Duration;import com.sun.btrace.annotations.Kind;import com.sun.btrace.annotations.Location;import com.sun.btrace.annotations.OnMethod;import com.sun.btrace.annotations.OnTimer;import com.sun.btrace.annotations.ProbeClassName;import com.sun.btrace.annotations.ProbeMethodName;import com.sun.btrace.annotations.Self;import com.sun.btrace.annotations.TLS;@BTrace(unsafe = true)public class TestOnMethod {    // line设置为-1会打印所有行    // 演示@OnMethod 、正则匹配、@Location、@ProbeClassName、@ProbeMethodName    @OnMethod(clazz = "com.yl.btraceDemo.impl.DemoInfImpl", method = "/.*/", location = @Location(value = Kind.LINE, line = 10))    public static void online(@ProbeClassName String pcn, @ProbeMethodName String pmn, int line) {        println("[online]:" + pcn + "." + pmn + ":" + line);    }    @OnMethod(clazz = "/com\\.yl\\.btraceDemo\\.impl..*/", location = @Location(value = Kind.LINE, line = 16))    public static void onlineMatch(@ProbeClassName String pcn, @ProbeMethodName String pmn, int line) {        println("[onlineMatch]:" + pcn + "." + pmn + ":" + line);    }    // 演示基于注解匹配、@Location、@Duration    @OnMethod(clazz = "@javax.jws.WebService", location = @Location(Kind.RETURN))    public static void onWebserviceReturn(@ProbeClassName String pcn, @ProbeMethodName String pmn, @Duration long d) {        println("[onWebserviceReturn]:"+Strings.strcat(Strings.strcat(pcn, "."), pmn));        println("[onWebserviceReturn]:"+Strings.strcat("Time taken (msec) ", Strings.str(d / 1000)));    }    // 演示@Self    private static Field msgField = Reflective.field("java.util.logging.LogRecord", "message");    @OnMethod(clazz = "+java.util.logging.Logger", method = "log")    public static void onLog(@Self Logger self, LogRecord record) {        println("[onLog]:"+Reflective.get(msgField, record));    }    // 演示Throw相关    @TLS    static Throwable currentException;    @OnMethod(clazz = "java.lang.Throwable", method = "<init>")    public static void onthrowFirst(@Self Throwable self, String s) {        currentException = self;    }    @OnMethod(clazz = "java.lang.Throwable", method = "<init>")    public static void onthrowSecond(@Self Throwable self, String s, Throwable cause) {        currentException = self;    }    @OnMethod(clazz = "java.lang.Throwable", method = "<init>")    public static void onthrowThird(@Self Throwable self, Throwable cause) {        currentException = self;    }    // when any constructor of java.lang.Throwable returns    // print the currentException's stack trace.    @OnMethod(clazz = "java.lang.Throwable", method = "<init>", location = @Location(Kind.RETURN))    public static void onthrowreturn() {        if (currentException != null) {            Threads.jstack(currentException);            currentException = null;        }    }    // FileTracker    @TLS    private static String name;    @OnMethod(clazz = "java.io.FileInputStream", method = "<init>")    public static void onNewFileInputStream(@Self FileInputStream self, File f) {        name = Strings.str(f);    }    @OnMethod(clazz = "java.io.FileInputStream", method = "<init>", type = "void (java.io.File)", location = @Location(Kind.RETURN))    public static void onNewFileInputStreamReturn() {        if (name != null) {            println("[onNewFileInputStreamReturn]:opened for read " + name);            name = null;        }    }    @OnMethod(clazz = "java.io.FileOutputStream", method = "<init>")    public static void onNewFileOutputStream(@Self FileOutputStream self, File f, boolean b) {        name = str(f);    }    // 演示OnMethod tpye    @OnMethod(clazz = "java.io.FileOutputStream", method = "<init>", type = "void (java.io.File, boolean)", location = @Location(Kind.RETURN))    public static void OnNewFileOutputStreamReturn() {        if (name != null) {            println("[OnNewFileOutputStreamReturn]:opened for write " + name);            name = null;        }    }    private static Field fdField = field("java.io.FileInputStream", "fd");    // 演示ontimer    @OnTimer(100)    public static void ontimer() {        runFinalization();    }    @OnMethod(clazz = "java.io.FileInputStream", method = "finalize")    public static void onfinalize(@Self Object me) {        println("[onfinalize]:"+concat("finalizing ", str(me)));        printFields("[onfinalize]:"+me);        printFields("[onfinalize]:"+get(fdField, me));    }    @OnMethod(clazz = "java.io.FileInputStream", method = "close")    public static void onclose(@Self Object me) {        println("[onclose]:"+concat("closing ", str(me)));        println("[onclose]:"+concat("thread: ", str(currentThread())));        printFields("[onclose]:"+me);        printFields("[onclose]:"+get(fdField, me));        jstack();    }    //Histogram    private static Map<String, AtomicInteger> histo = Collections.newHashMap();    @OnMethod(clazz = "com.yl.btraceDemo.impl.DemoInfImpl", method = "add")    public static void onnewObject(@Self Object obj) {        String cn = Reflective.name(classOf(obj));        AtomicInteger ai = Collections.get(histo, cn);        if (ai == null) {            ai = Atomic.newAtomicInteger(1);            Collections.put(histo, cn, ai);        } else {            Atomic.incrementAndGet(ai);        }    }    @OnTimer(4000)    public static void printHisto() {        if (Collections.size(histo) != 0) {            printNumberMap("[printHisto]:"+"Component Histogram", histo);        }    }}

运行（本例在windows下运行）

运行测试主类
启动控制台，jps查询pid
btrace -u pid $path\TestOnMethod.java
在运行的主类按任意键继续运行

d:\M4etcd\btraceDemo\src\com\yl\btraceDemo\scripts>jps5477241064 TestMain57432 Jpsd:\M4etcd\btraceDemo\src\com\yl\btraceDemo\scripts>btrace -u 41064 TestOnMethod.java[onfinalize]:finalizing java.io.FileInputStream@7cdbacbe{value=[C@7623c7ce, hash=0, }{value=[C@123ea3e8, hash=0, }[onclose]:closing java.io.FileInputStream@7cdbacbe[onclose]:thread: Thread[Finalizer,8,system]{value=[C@2d8a20f, hash=0, }{value=[C@6a2d082d, hash=0, }java.io.FileInputStream.close(FileInputStream.java)java.io.FileInputStream.finalize(FileInputStream.java:397)java.lang.System$2.invokeFinalize(System.java:1270)java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)java.lang.ref.Finalizer.access$100(Finalizer.java:34)……

例子里面写的比较多，运行时，可以只关注部分，注释其他 这样信息就比较容易分辨
比如只保留

@BTrace(unsafe = true)public class TestOnMethod {    // line设置为-1会打印所有行    // 演示@OnMethod 、正则匹配、@Location、@ProbeClassName、@ProbeMethodName    @OnMethod(clazz = "com.yl.btraceDemo.impl.DemoInfImpl", method = "/.*/", location = @Location(value = Kind.LINE, line = 10))    public static void online(@ProbeClassName String pcn, @ProbeMethodName String pmn, int line) {        println("[online]:" + pcn + "." + pmn + ":" + line);    }    @OnMethod(clazz = "/com\\.yl\\.btraceDemo\\.impl..*/", location = @Location(value = Kind.LINE, line = 16))    public static void onlineMatch(@ProbeClassName String pcn, @ProbeMethodName String pmn, int line) {        println("[onlineMatch]:" + pcn + "." + pmn + ":" + line);    }}

例子的输出信息就简单很多~ 同理可以注释其他的注入

d:\M4etcd\btraceDemo\src\com\yl\btraceDemo\scripts>jps53408 Jps547729524 TestMaind:\M4etcd\btraceDemo\src\com\yl\btraceDemo\scripts>btrace -u 9524 TestOnMethod.java[online]:com.yl.btraceDemo.impl.DemoInfImpl.add:10[onlineMatch]:com.yl.btraceDemo.impl.DemoInfImpl.sub:16[online]:com.yl.btraceDemo.impl.DemoInfImpl.add:10d:\M4etcd\btraceDemo\src\com\yl\btraceDemo\scripts>

btrace用户手册1.3.9
btrace注解
btrace示例

原文连接 http://blog.csdn.net/yue530tomtom/article/details/78713395