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refactor

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git-svn-id: http://code.alibabatech.com/svn/druid/trunk@667 b9813039-fb51-4c41-a8b9-e21c2acb5095
This commit is contained in:
wenshao
2011-09-07 02:30:00 +00:00
parent bbac0cfdaf
commit c3e716557b
2 changed files with 63 additions and 47 deletions
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src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+39 -47
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@@ -48,7 +48,6 @@ import com.alibaba.druid.pool.vendor.OracleValidConnectionChecker;
import com.alibaba.druid.pool.vendor.SybaseExceptionSorter;
import com.alibaba.druid.proxy.DruidDriver;
import com.alibaba.druid.proxy.jdbc.DataSourceProxyConfig;
import com.alibaba.druid.util.ConcurrentIdentityHashMap;
import com.alibaba.druid.util.JdbcUtils;
/**
@@ -57,40 +56,35 @@ 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);
// global instances
private static final Object PRESENT = new Object();
private static final ConcurrentIdentityHashMap<DruidDataSource, Object> instances = new ConcurrentIdentityHashMap<DruidDataSource, Object>();
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 connectCount = 0L;
private long closeCount = 0L;
private long connectErrorCount = 0L;
private long recycleCount = 0L;
private long createConnectionCount = 0L;
private long destroyCount = 0L;
// store
private ConnectionHolder[] connections;
private int poolingCount = 0;
private int activeCount = 0;
private ConnectionHolder[] connections;
private int poolingCount = 0;
private int activeCount = 0;
// threads
private CreateConnectionThread createConnectionThread;
private DestroyConnectionThread destoryConnectionThread;
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;
public DruidDataSource(){
}
@@ -121,7 +115,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} catch (InterruptedException e) {
throw new SQLException("interrupt", e);
}
try {
if (inited) {
return;
@@ -230,7 +224,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
inited = true;
createdTime = new Date();
instances.put(this, PRESENT);
Global.add(this);
if (connectError != null && poolingCount == 0) {
throw connectError;
@@ -305,13 +299,13 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
private void discardConnection(Connection realConnection) throws SQLException {
JdbcUtils.close(realConnection);
try {
lock.lockInterruptibly();
} catch (InterruptedException e) {
throw new SQLException("interrupt", e);
}
try {
activeCount--;
} finally {
@@ -327,7 +321,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} catch (InterruptedException e) {
throw new SQLException("interrupt", e);
}
try {
if (!enable) {
connectErrorCount++;
@@ -430,7 +424,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
boolean validate = testConnectionInternal(conn);
if (!validate) {
JdbcUtils.close(conn);
lock.lockInterruptibly();
try {
destroyCount++;
@@ -462,7 +456,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} catch (InterruptedException interruptEx) {
throw new SQLException("interrupt", interruptEx);
}
try {
activeCount--;
closeCount++;
@@ -498,8 +492,8 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
}
}
poolingCount = 0;
instances.remove(this);
Global.remove(this);
enable = false;
notEmpty.signalAll();
} finally {
@@ -528,7 +522,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
while (poolingCount == 0) {
empty.signal(); // send signal to CreateThread create connection
notEmpty.await(); // signal by recycle or creator
if (!enable) {
connectErrorCount++;
throw new DataSourceDisableException();
@@ -559,7 +553,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
try {
estimate = notEmpty.awaitNanos(estimate); // signal by recycle or creator
if (!enable) {
connectErrorCount++;
throw new DataSourceDisableException();
@@ -642,14 +636,14 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} catch (InterruptedException e2) {
break;
}
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
empty.await();
empty.await();
continue;
}
@@ -659,8 +653,6 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
continue;
}
} catch (InterruptedException e) {
break;
} catch (RuntimeException e) {
@@ -671,9 +663,9 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} finally {
lock.unlock();
}
Connection connection = null;
try {
connection = connectionFactory.createConnection();
} catch (SQLException e) {
@@ -695,11 +687,11 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
LOG.error("create connection error", e);
break;
}
if (connection == null) {
continue;
}
lock.lock();
try {
connections[poolingCount++] = new ConnectionHolder(DruidDataSource.this, connection);
@@ -800,7 +792,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
}
public static Set<DruidDataSource> getInstances() {
return instances.keySet();
return Global.getInstances();
}
public int getRawDriverMajorVersion() {
@@ -843,7 +835,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
} catch (InterruptedException e) {
return;
}
try {
final int checkCount = poolingCount - minIdle;
for (int i = 0; i < checkCount; ++i) {
@@ -877,7 +869,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
destroyCount++;
}
}
public int getWaitThreadCount() {
lock.lock();
try {
@@ -886,7 +878,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
lock.unlock();
}
}
public int getLockQueueLength() {
return lock.getQueueLength();
}