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package JACE.tests.Concurrency;
import JACE.OS.*;
import JACE.ASX.*;
import JACE.Concurrency.*;
/**
* Performs a test with 5 threads. This should test what happens during
* renews, also testing what happens when timeout exceptions are generated
* during operations.
*
* Sample output:
*
* Thread 1 calling acquire
* Thread 1 got lock
* Thread 1 doing work
* Thread 2 calling acquire
* Thread 1 finished doing work
* Thread 1 calling renew -1 1
* Thread 2 got lock
* Thread 2 doing work
* Thread 3 calling acquire
* Thread 4 calling acquire
* Thread 5 calling acquire with 1 sec timeout
* Thread 1 timed out in renew
* Thread 1 failed renewing
* Thread 1 calling release
* Thread 1 failed release
* Thread 5 timed out in acquire
* Thread 5 failed acquire
* Thread 5 calling release
* Thread 5 failed release
* Thread 2 finished doing work
* Thread 2 calling renew 1
* Thread 3 got lock
* Thread 3 doing work
* Thread 3 finished doing work
* Thread 3 calling release
* Thread 3 released
* Thread 2 got the lock back
* Thread 2 calling release
* Thread 2 released
* Thread 4 got lock
* Thread 4 doing work
* Thread 4 finished doing work
* Thread 4 calling release
* Thread 4 released
*/
public class TimingTest
{
static class Worker extends Thread
{
AbstractLock lock;
String name;
int order;
public Worker (String name, int order, AbstractLock lock)
{
this.name = name;
this.order = order;
this.lock = lock;
}
public void run()
{
switch (this.order)
{
case 1:
methodA();
break;
case 2:
methodB();
break;
case 3:
methodC();
break;
case 4:
methodD();
break;
}
}
public void methodA()
{
// acquires
// launches a class 2 worker
// works
// renew -1 with a 1 sec timeout (intended to fail)
// release
try {
if (acquire() == AbstractLock.FAILURE)
return;
new Worker("Thread 2", 2, lock).start();
work(3000);
renew(-1, 1);
} finally {
release();
}
}
public void methodB()
{
// acquire
// launch two new class 3 workers and one class 4 worker
// work
// renew, yielding to one waiter
// release
try {
if (acquire() == AbstractLock.FAILURE)
return;
new Worker ("Thread 3", 3, lock).start ();
new Worker ("Thread 4", 3, lock).start ();
new Worker ("Thread 5", 4, lock).start ();
work(3000);
renew(1);
} finally {
release();
}
}
public void methodC()
{
// acquire
// work
// release
try {
if (acquire() == AbstractLock.FAILURE)
return;
work(1000);
} finally {
release();
}
}
public void methodD()
{
// acquire with a short timeout
// (shouldn't get past the timeout)
try {
if (acquire (1) == AbstractLock.FAILURE)
return;
ACE.DEBUG (name + " probably should have timed out in acquire");
work (1000);
} finally {
release ();
}
}
public int acquire (int relativeTimeout)
{
int result = AbstractLock.FAILURE;
ACE.DEBUG(name + " calling acquire with " + relativeTimeout +
" sec timeout");
try {
result = lock.acquire (TimeValue.relativeTimeOfDay (relativeTimeout, 0));
} catch (JACE.ASX.TimeoutException e) {
ACE.DEBUG(name + " timed out in acquire");
} catch (Exception e) {
ACE.DEBUG (name + " got exception: " + e);
}
if (result != AbstractLock.FAILURE)
ACE.DEBUG(name + " got lock");
else
ACE.DEBUG(name + " failed acquire");
return result;
}
public int acquire()
{
int result = AbstractLock.FAILURE;
ACE.DEBUG(name + " calling acquire");
try {
result = lock.acquire();
} catch (Exception e) {
ACE.DEBUG(name + " got exception: " + e);
}
if (result != AbstractLock.FAILURE)
ACE.DEBUG(name + " got lock");
else
ACE.DEBUG(name + " failed acquire");
return result;
}
public void release()
{
ACE.DEBUG(name + " calling release");
int result = AbstractLock.FAILURE;
try {
result = lock.release();
} catch (Exception e) {
ACE.DEBUG (name + " got exception: " + e);
}
if (result != AbstractLock.FAILURE)
ACE.DEBUG(name + " released");
else
ACE.DEBUG(name + " failed release");
}
public void renew(int pos)
{
int result = AbstractLock.FAILURE;
ACE.DEBUG(name + " calling renew " + pos);
try {
result = lock.renew(pos);
} catch (Exception e) {
ACE.DEBUG (name + " got exception: " + e);
}
if (result != AbstractLock.FAILURE)
ACE.DEBUG(name + " got the lock back");
else
ACE.DEBUG(name + " failed renewing");
}
public void renew(int pos, int relativeTimeout)
{
int result = AbstractLock.FAILURE;
ACE.DEBUG(name + " calling renew " + pos + " " +
relativeTimeout);
try {
result = lock.renew(pos,
TimeValue.relativeTimeOfDay(relativeTimeout,
0));
} catch (JACE.ASX.TimeoutException e) {
ACE.DEBUG(name + " timed out in renew");
} catch (Exception e) {
ACE.DEBUG (name + " got exception: " + e);
}
if (result != AbstractLock.FAILURE)
ACE.DEBUG(name + " got the lock back");
else
ACE.DEBUG(name + " failed renewing");
}
public void work(int ms)
{
ACE.DEBUG(name + " doing work");
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
ACE.DEBUG(name + " was interrupted");
}
ACE.DEBUG(name + " finished doing work");
}
}
/**
* Command line:
*
* Optional class name (which implements AbstractLock) to test
*/
public static void main(String args[]) {
AbstractLock lock;
ACE.enableDebugging ();
try {
if (args.length > 0) {
ACE.DEBUG("Using class " + args[0] + " as the Lock");
lock = (AbstractLock)(Class.forName (args[0]).newInstance ());
} else
lock = new Token ();
new Worker("Thread 1", 1, lock).start();
} catch (Exception e) {
ACE.ERROR("Error: " + e);
}
}
}
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