ejb与java序列化(2)--测试代码
接上篇,有兴趣的朋友可以直接拿我的测试代码自行测试,请自行修改诸如线程数,执行时间,序列化的数据量大小等参数。如果想尝试做thread dump,可以打开相关的两个注释,会更方便一些,代码中都有相应的注释可供参考。测试代码如下:
package
test;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
public class Test implements Runnable {
// Notice! set the three test parameter to what you want first
/**
* thread count to run test
*/
private static final int THREAD_COUNT = 50 ;
/**
* time in seconds to run test
*/
private static final long TEST_TIME_SECOND = 1 * 30 ;
/**
* during test, we serialize a Data instance with an ArrayList that contains DataItem instance.
* This is to set how many DataItem in the ArrayList.
*/
private static final long ITEMS_COUNT_IN_TEST_OBJECT = 1000 ;
private static int finishedCount = 0 ;
private static boolean needStop = false ;
private static Object needStopLock = new Object();
private static Object finishedCountLock = new Object();
private static boolean isNeedStop() {
synchronized (needStopLock) {
return needStop;
}
}
private static void setNeedStop() {
synchronized (needStopLock) {
needStop = true ;
}
}
private static void addFinisedCount() {
synchronized (finishedCountLock) {
finishedCount ++ ;
}
}
/**
* @param args
*/
public static void main(String[] args) {
// run it first to load all the class
new Test().test();
// to dump thread open these
// try {
// Thread.sleep(20 * 1000);
// System.out.println("main sleep. go to find pid, we need it later to send signal");
// Thread.sleep(2 * 1000);
// System.out.println("prepard to dump");
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
long timeBegin = System.currentTimeMillis();
for ( int i = 0 ; i < THREAD_COUNT; i ++ ) {
Thread t = new Thread( new Test());
t.setName( " testthread " + i);
t.start();
}
long timeEnd = timeBegin + TEST_TIME_SECOND * 1000 ;
while (System.currentTimeMillis() < timeEnd) {
try {
Thread.sleep( 50 );
} catch (InterruptedException e) {
e.printStackTrace();
}
}
setNeedStop();
System.out.println(THREAD_COUNT + " thread finished " + finishedCount
+ " times in " + TEST_TIME_SECOND + " seconds " );
// to dump thread open these
// try {
// Thread.sleep(5 * 1000);
// // System.out.println("dump now");
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
}
public void run() {
while ( ! isNeedStop()) {
test();
addFinisedCount();
}
}
private void test() {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
Data data = new Data();
try {
// long time1 = System.currentTimeMillis();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(data);
bos.toByteArray();
// long time2 = System.currentTimeMillis();
// System.out.print((time2 - time1) + " ");
} catch (IOException e) {
e.printStackTrace();
}
}
private static class Data implements Serializable {
private static final long serialVersionUID = - 376987039014824563L ;
private static final ArrayList DEFAULT = new ArrayList();
static {
for ( int i = 0 ; i < ITEMS_COUNT_IN_TEST_OBJECT; i ++ ) {
DEFAULT.add( new DataItem(i));
// DEFAULT.add(DataItem.a + i);
}
}
private ArrayList content = DEFAULT;
}
private static class DataItem implements Serializable {
private static final long serialVersionUID = 1L ;
private static final String a = " sdfsdfsdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff " ;
private int number;
private String content;
public DataItem( int number) {
this .number = number;
this .content = a + number;
}
}
}
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
public class Test implements Runnable {
// Notice! set the three test parameter to what you want first
/**
* thread count to run test
*/
private static final int THREAD_COUNT = 50 ;
/**
* time in seconds to run test
*/
private static final long TEST_TIME_SECOND = 1 * 30 ;
/**
* during test, we serialize a Data instance with an ArrayList that contains DataItem instance.
* This is to set how many DataItem in the ArrayList.
*/
private static final long ITEMS_COUNT_IN_TEST_OBJECT = 1000 ;
private static int finishedCount = 0 ;
private static boolean needStop = false ;
private static Object needStopLock = new Object();
private static Object finishedCountLock = new Object();
private static boolean isNeedStop() {
synchronized (needStopLock) {
return needStop;
}
}
private static void setNeedStop() {
synchronized (needStopLock) {
needStop = true ;
}
}
private static void addFinisedCount() {
synchronized (finishedCountLock) {
finishedCount ++ ;
}
}
/**
* @param args
*/
public static void main(String[] args) {
// run it first to load all the class
new Test().test();
// to dump thread open these
// try {
// Thread.sleep(20 * 1000);
// System.out.println("main sleep. go to find pid, we need it later to send signal");
// Thread.sleep(2 * 1000);
// System.out.println("prepard to dump");
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
long timeBegin = System.currentTimeMillis();
for ( int i = 0 ; i < THREAD_COUNT; i ++ ) {
Thread t = new Thread( new Test());
t.setName( " testthread " + i);
t.start();
}
long timeEnd = timeBegin + TEST_TIME_SECOND * 1000 ;
while (System.currentTimeMillis() < timeEnd) {
try {
Thread.sleep( 50 );
} catch (InterruptedException e) {
e.printStackTrace();
}
}
setNeedStop();
System.out.println(THREAD_COUNT + " thread finished " + finishedCount
+ " times in " + TEST_TIME_SECOND + " seconds " );
// to dump thread open these
// try {
// Thread.sleep(5 * 1000);
// // System.out.println("dump now");
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
}
public void run() {
while ( ! isNeedStop()) {
test();
addFinisedCount();
}
}
private void test() {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
Data data = new Data();
try {
// long time1 = System.currentTimeMillis();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(data);
bos.toByteArray();
// long time2 = System.currentTimeMillis();
// System.out.print((time2 - time1) + " ");
} catch (IOException e) {
e.printStackTrace();
}
}
private static class Data implements Serializable {
private static final long serialVersionUID = - 376987039014824563L ;
private static final ArrayList DEFAULT = new ArrayList();
static {
for ( int i = 0 ; i < ITEMS_COUNT_IN_TEST_OBJECT; i ++ ) {
DEFAULT.add( new DataItem(i));
// DEFAULT.add(DataItem.a + i);
}
}
private ArrayList content = DEFAULT;
}
private static class DataItem implements Serializable {
private static final long serialVersionUID = 1L ;
private static final String a = " sdfsdfsdfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff " ;
private int number;
private String content;
public DataItem( int number) {
this .number = number;
this .content = a + number;
}
}
}
也可以从这里直接下载到完整的eclipse项目,除上面的代码外,还有thread dump文件和已经设置好的jprobe的配置文件。
(blogjava不能上传文件,所以只好放fs2you)
http://www.fs2you.com/files/59a26119-5d1a-11dd-ad4f-0014221b798a/