Merge selected parts of pull request.

src/main/java/com/zaxxer/hikari/HikariDataSource.java

@@ -79,7 +79,7 @@ public class HikariDataSource extends HikariConfig implements DataSource, Closea
    @Override
    public Connection getConnection() throws SQLException
    {
-      if (isShutdown.get()) {
+      if (isClosed()) {
          throw new SQLException("Pool " + pool.getConfiguration().getPoolName() + " has been shutdown");
       }
 

src/main/java/com/zaxxer/hikari/metrics/CodaHaleMetricsTracker.java

@@ -37,10 +37,11 @@ public final class CodaHaleMetricsTracker extends MetricsTracker
       super(pool);
 
       this.registry = registry;
-      this.connectionObtainTimer = registry.timer(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "Wait"));
-      this.connectionUsage = registry.histogram(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "Usage"));
+      final String poolName = pool.getConfiguration().getPoolName();
+      this.connectionObtainTimer = registry.timer(MetricRegistry.name(poolName, "pool", "Wait"));
+      this.connectionUsage = registry.histogram(MetricRegistry.name(poolName, "pool", "Usage"));
 
-      registry.register(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "TotalConnections"),
+      registry.register(MetricRegistry.name(poolName, "pool", "TotalConnections"),
                         new CachedGauge<Integer>(10, TimeUnit.SECONDS) {
                            @Override
                            protected Integer loadValue()
@@ -49,7 +50,7 @@ public final class CodaHaleMetricsTracker extends MetricsTracker
                            }
                         });
 
-      registry.register(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "IdleConnections"),
+      registry.register(MetricRegistry.name(poolName, "pool", "IdleConnections"),
                         new CachedGauge<Integer>(10, TimeUnit.SECONDS) {
                            @Override
                            protected Integer loadValue()
@@ -58,7 +59,7 @@ public final class CodaHaleMetricsTracker extends MetricsTracker
                            }
                         });
 
-      registry.register(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "ActiveConnections"),
+      registry.register(MetricRegistry.name(poolName, "pool", "ActiveConnections"),
                         new CachedGauge<Integer>(10, TimeUnit.SECONDS) {
                            @Override
                            protected Integer loadValue()
@@ -67,7 +68,7 @@ public final class CodaHaleMetricsTracker extends MetricsTracker
                            }
                         });
 
-      registry.register(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "PendingConnections"),
+      registry.register(MetricRegistry.name(poolName, "pool", "PendingConnections"),
                         new CachedGauge<Integer>(10, TimeUnit.SECONDS) {
                            @Override
                            protected Integer loadValue()
@@ -81,12 +82,13 @@ public final class CodaHaleMetricsTracker extends MetricsTracker
    @Override
    public void close()
    {
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "Wait"));
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "Usage"));
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "TotalConnections"));
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "IdleConnections"));
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "ActiveConnections"));
-      registry.remove(MetricRegistry.name(pool.getConfiguration().getPoolName(), "pool", "PendingConnections"));
+      final String poolName = pool.getConfiguration().getPoolName();
+      registry.remove(MetricRegistry.name(poolName, "pool", "Wait"));
+      registry.remove(MetricRegistry.name(poolName, "pool", "Usage"));
+      registry.remove(MetricRegistry.name(poolName, "pool", "TotalConnections"));
+      registry.remove(MetricRegistry.name(poolName, "pool", "IdleConnections"));
+      registry.remove(MetricRegistry.name(poolName, "pool", "ActiveConnections"));
+      registry.remove(MetricRegistry.name(poolName, "pool", "PendingConnections"));
    }
 
    /** {@inheritDoc} */

src/main/java/com/zaxxer/hikari/metrics/MetricsTracker.java

@@ -24,7 +24,7 @@ import com.zaxxer.hikari.pool.PoolBagEntry;
  *
  * @author Brett Wooldridge
  */
-public class MetricsTracker
+public class MetricsTracker implements AutoCloseable
 {
    public static final MetricsContext NO_CONTEXT = new MetricsContext();
 
@@ -44,6 +44,7 @@ public class MetricsTracker
    {
    }
 
+   @Override
    public void close()
    {
    }

src/main/java/com/zaxxer/hikari/pool/HikariPool.java

@@ -251,16 +251,19 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
          addConnectionExecutor.awaitTermination(5L, TimeUnit.SECONDS);
 
          final ExecutorService assassinExecutor = createThreadPoolExecutor(configuration.getMaximumPoolSize(), "HikariCP connection assassin",
-                                                                     configuration.getThreadFactory(), new ThreadPoolExecutor.CallerRunsPolicy());
-         final long start = System.currentTimeMillis();
-         do {
-            softEvictConnections();
-            abortActiveConnections(assassinExecutor);
+                                                                           configuration.getThreadFactory(), new ThreadPoolExecutor.CallerRunsPolicy());
+         try {
+            final long start = System.currentTimeMillis();
+            do {
+               softEvictConnections();
+               abortActiveConnections(assassinExecutor);
+            }
+            while (getTotalConnections() > 0 && elapsedTimeMs(start) < TimeUnit.SECONDS.toNanos(5));
+         } finally {
+            assassinExecutor.shutdown();
+            assassinExecutor.awaitTermination(5L, TimeUnit.SECONDS);
          }
-         while (getTotalConnections() > 0 && elapsedTimeMs(start) < TimeUnit.SECONDS.toMillis(5));
 
-         assassinExecutor.shutdown();
-         assassinExecutor.awaitTermination(5L, TimeUnit.SECONDS);
          closeConnectionExecutor.shutdown();
          closeConnectionExecutor.awaitTermination(5L, TimeUnit.SECONDS);
       }
@@ -352,6 +355,7 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
    public Future<Boolean> addBagItem()
    {
       FutureTask<Boolean> future = new FutureTask<Boolean>(new Runnable() {
+         @Override
          public void run()
          {
             long sleepBackoff = 200L;
@@ -447,7 +451,7 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
    /**
     * Permanently close the real (underlying) connection (eat any exception).
     *
-    * @param connectionProxy the connection to actually close
+    * @param bagEntry the connection to actually close
     */
    void closeConnection(final PoolBagEntry bagEntry, final String closureReason)
    {
@@ -461,6 +465,7 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
          }
          
          closeConnectionExecutor.execute(new Runnable() {
+            @Override
             public void run() {
                poolUtils.quietlyCloseConnection(connection, closureReason);
             }
@@ -475,7 +480,7 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
    /**
     * Create and add a single connection to the pool.
     */
-   private final boolean addConnection()
+   private boolean addConnection()
    {
       // Speculative increment of totalConnections with expectation of success
       if (totalConnections.incrementAndGet() > configuration.getMaximumPoolSize()) {
@@ -526,6 +531,7 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
 
       if (connectionsToAdd > 0 && LOGGER.isDebugEnabled()) {
          addConnectionExecutor.execute(new Runnable() {
+            @Override
             public void run() {
                logPoolState("After fill ");
             }
@@ -537,7 +543,6 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
     * Check whether the connection is alive or not.
     *
     * @param connection the connection to test
-    * @param timeoutMs the timeout before we consider the test a failure
     * @return true if the connection is alive, false if it is not alive or we timed out
     */
    private boolean isConnectionAlive(final Connection connection)
@@ -572,8 +577,6 @@ public class HikariPool implements HikariPoolMBean, IBagStateListener
 
    /**
     * Attempt to abort() active connections, or close() them.
-    *
-    * @throws InterruptedException 
     */
    private void abortActiveConnections(final ExecutorService assassinExecutor)
    {

src/main/java/com/zaxxer/hikari/pool/PoolBagEntry.java

@@ -49,6 +49,7 @@ public final class PoolBagEntry implements IConcurrentBagEntry
       final long maxLifetime = pool.configuration.getMaxLifetime() - variance;
       if (maxLifetime > 0) {
          endOfLife = pool.houseKeepingExecutorService.schedule(new Runnable() {
+            @Override
             public void run()
             {
                // If we can reserve it, close it

src/main/java/com/zaxxer/hikari/proxy/ConnectionProxy.java

@@ -112,8 +112,8 @@ public abstract class ConnectionProxy implements IHikariConnectionProxy
          boolean isForceClose = sqlState.startsWith("08") | SQL_ERRORS.contains(sqlState);
          if (isForceClose) {
             bagEntry.evicted = true;
-            LOGGER.warn("Connection {} ({}) marked as broken because of SQLSTATE({}), ErrorCode({}).", delegate.toString(),
-                                      parentPool.toString(), sqlState, sqle.getErrorCode(), sqle);
+            LOGGER.warn("Connection {} ({}) marked as broken because of SQLSTATE({}), ErrorCode({}).", delegate,
+                                      parentPool, sqlState, sqle.getErrorCode(), sqle);
          }
          else {
             SQLException nse = sqle.getNextException();

src/main/java/com/zaxxer/hikari/util/ConcurrentBag.java

@@ -52,7 +52,7 @@ import org.slf4j.LoggerFactory;
  *
  * @param <T> the templated type to store in the bag
  */
-public class ConcurrentBag<T extends IConcurrentBagEntry>
+public class ConcurrentBag<T extends IConcurrentBagEntry> implements AutoCloseable
 {
    private static final Logger LOGGER = LoggerFactory.getLogger(ConcurrentBag.class);
 
@@ -155,7 +155,7 @@ public class ConcurrentBag<T extends IConcurrentBagEntry>
          synchronizer.releaseShared(sequence.incrementAndGet());
       }
       else {
-         LOGGER.warn("Attempt to remove an object from the bag that does not exist: {}", bagEntry.toString());
+         LOGGER.warn("Attempt to remove an object from the bag that does not exist: {}", bagEntry);
       }
    }
 
@@ -187,13 +187,13 @@ public class ConcurrentBag<T extends IConcurrentBagEntry>
    public boolean remove(final T bagEntry)
    {
       if (!bagEntry.state().compareAndSet(STATE_IN_USE, STATE_REMOVED) && !bagEntry.state().compareAndSet(STATE_RESERVED, STATE_REMOVED) && !closed) {
-         LOGGER.warn("Attempt to remove an object from the bag that was not borrowed or reserved: {}", bagEntry.toString());
+         LOGGER.warn("Attempt to remove an object from the bag that was not borrowed or reserved: {}", bagEntry);
          return false;
       }
 
       final boolean removed = sharedList.remove(bagEntry);
       if (!removed && !closed) {
-         LOGGER.warn("Attempt to remove an object from the bag that does not exist: {}", bagEntry.toString());
+         LOGGER.warn("Attempt to remove an object from the bag that does not exist: {}", bagEntry);
       }
       return removed;
    }
@@ -201,6 +201,7 @@ public class ConcurrentBag<T extends IConcurrentBagEntry>
    /**
     * Close the bag to further adds.
     */
+   @Override
    public void close()
    {
       closed = true;
@@ -258,7 +259,7 @@ public class ConcurrentBag<T extends IConcurrentBagEntry>
          synchronizer.releaseShared(checkInSeq);
       }
       else {
-         LOGGER.warn("Attempt to relinquish an object to the bag that was not reserved: {}", bagEntry.toString());
+         LOGGER.warn("Attempt to relinquish an object to the bag that was not reserved: {}", bagEntry);
       }
    }
 

src/test/java/com/zaxxer/hikari/TestConnections.java

@@ -209,7 +209,7 @@ public class TestConnections
 
          Assert.assertTrue("Connection should have closed", connection.isClosed());
          Assert.assertFalse("Connection should have closed", connection.isValid(5));
-         Assert.assertTrue("Expected to contain ClosedConnection, but was " + connection.toString(), connection.toString().contains("ClosedConnection"));
+         Assert.assertTrue("Expected to contain ClosedConnection, but was " + connection, connection.toString().contains("ClosedConnection"));
 
          connection.close();
       }