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自己维护notEmptyWaitThreadCount计数

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git-svn-id: http://code.alibabatech.com/svn/druid/trunk@713 b9813039-fb51-4c41-a8b9-e21c2acb5095
This commit is contained in:
wenshao
2011-09-10 12:58:02 +00:00
parent 449728843f
commit 90b14ec70b
3 changed files with 77 additions and 26 deletions
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src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+31 -25
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@@ -59,41 +59,42 @@ import com.alibaba.druid.util.JdbcUtils;
*/
public class DruidDataSource extends DruidAbstractDataSource implements DruidDataSourceMBean, ManagedDataSource, Referenceable {
private final static Log LOG = LogFactory.getLog(DruidDataSource.class);
private final static Log LOG = LogFactory.getLog(DruidDataSource.class);
private static final long serialVersionUID = 1L;
private static final long serialVersionUID = 1L;
private final ReentrantLock lock = new ReentrantLock();
private final ReentrantLock lock = new ReentrantLock();
private final Condition notEmpty = lock.newCondition();
private final Condition empty = lock.newCondition();
private final Condition notEmpty = lock.newCondition();
private final Condition empty = lock.newCondition();
// stats
private long connectCount = 0L;
private long closeCount = 0L;
private long connectErrorCount = 0L;
private long recycleCount = 0L;
private long createConnectionCount = 0L;
private long destroyCount = 0L;
private long removeAbandonedCount = 0L;
private long notEmptyWaitCount = 0L;
private long notEmptySignalCount = 0L;
private long notEmptyWaitNanos = 0L;
private long connectCount = 0L;
private long closeCount = 0L;
private long connectErrorCount = 0L;
private long recycleCount = 0L;
private long createConnectionCount = 0L;
private long destroyCount = 0L;
private long removeAbandonedCount = 0L;
private long notEmptyWaitCount = 0L;
private long notEmptySignalCount = 0L;
private long notEmptyWaitNanos = 0L;
// store
private ConnectionHolder[] connections;
private int poolingCount = 0;
private int activeCount = 0;
private int poolingCount = 0;
private int activeCount = 0;
private int notEmptyWaitThreadCount = 0;
// threads
private CreateConnectionThread createConnectionThread;
private DestroyConnectionThread destoryConnectionThread;
private final CountDownLatch initedLatch = new CountDownLatch(2);
private final CountDownLatch initedLatch = new CountDownLatch(2);
private boolean enable = false;
private boolean enable = false;
private boolean resetStatEnable = true;
private boolean resetStatEnable = true;
public DruidDataSource(){
}
@@ -583,7 +584,12 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
try {
while (poolingCount == 0) {
empty.signal(); // send signal to CreateThread create connection
notEmpty.await(); // signal by recycle or creator
notEmptyWaitThreadCount++;
try {
notEmpty.await(); // signal by recycle or creator
} finally {
notEmptyWaitThreadCount--;
}
notEmptyWaitCount++;
if (!enable) {
@@ -615,6 +621,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
throw new GetConnectionTimeoutException();
}
notEmptyWaitThreadCount++;
try {
long startEstimate = estimate;
estimate = notEmpty.awaitNanos(estimate); // signal by recycle or creator
@@ -629,6 +636,8 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
notEmpty.signal(); // propagate to non-interrupted thread
notEmptySignalCount++;
throw ie;
} finally {
notEmptyWaitThreadCount--;
}
if (poolingCount == 0) {
@@ -720,10 +729,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
try {
// 必须存在线程等待，才创建连接
int waitThreadCount = lock.getWaitQueueLength(notEmpty);
if (poolingCount >= waitThreadCount) {
notEmpty.signal(); // 防止信号丢失引起的等待
if (poolingCount >= notEmptyWaitThreadCount) {
notEmptySignalCount++;
empty.await();
continue;