Add Closeable to JedisPool.

This allows JedisPool instances to also participate in try-with-resources.

Adds tests (both for JedisPool and the Jedis code itself).

src/main/java/redis/clients/util/Pool.java

@@ -1,5 +1,7 @@
 package redis.clients.util;
 
+import java.io.Closeable;
+
 import org.apache.commons.pool2.PooledObjectFactory;
 import org.apache.commons.pool2.impl.GenericObjectPool;
 import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
@@ -7,7 +9,7 @@ import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
 import redis.clients.jedis.exceptions.JedisConnectionException;
 import redis.clients.jedis.exceptions.JedisException;
 
-public abstract class Pool<T> {
+public abstract class Pool<T> implements Closeable {
     protected GenericObjectPool<T> internalPool;
 
     /**
@@ -17,6 +19,15 @@ public abstract class Pool<T> {
     public Pool() {
     }
 
+    @Override
+    public void close() {
+	closeInternalPool();
+    }
+
+    public boolean isClosed() {
+	return this.internalPool.isClosed();
+    }
+
     public Pool(final GenericObjectPoolConfig poolConfig,
 	    PooledObjectFactory<T> factory) {
 	initPool(poolConfig, factory);
@@ -81,4 +92,4 @@ public abstract class Pool<T> {
 	    throw new JedisException("Could not destroy the pool", e);
 	}
     }
-}
+}

src/test/java/redis/clients/jedis/tests/Closer.java

@@ -0,0 +1,39 @@
+package redis.clients.jedis.tests;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+
+class Closer implements Closeable {
+    private final Set<Closeable> elements = new HashSet<Closeable>();
+
+    synchronized <T extends Closeable> T register(T element) {
+	if (element != null) {
+	    elements.add(element);
+	}
+	return element;
+    }
+
+    public synchronized void close() throws IOException {
+	Throwable caught = null;
+
+	for (Closeable element : elements) {
+	    try {
+		element.close();
+	    }
+	    catch (Throwable t) {
+		caught = t;
+	    }
+	}
+
+	elements.clear();
+
+	if (caught != null) {
+	    if (caught instanceof IOException) {
+		throw (IOException) caught;
+	    }
+	    throw (RuntimeException) caught;
+	}
+    }
+}

src/test/java/redis/clients/jedis/tests/ConnectionCloseTest.java

@@ -0,0 +1,51 @@
+package redis.clients.jedis.tests;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import redis.clients.jedis.Connection;
+import redis.clients.jedis.exceptions.JedisConnectionException;
+
+public class ConnectionCloseTest extends Assert {
+
+	private final Closer closer = new Closer();
+
+	private Connection client;
+
+	@Before
+	public void setUp() throws Exception {
+		client = closer.register(new Connection());
+	}
+
+	@After
+	public void tearDown() throws Exception {
+		closer.close();
+	}
+
+	@Test(expected = JedisConnectionException.class)
+	public void checkUnkownHost() {
+		client.setHost("someunknownhost");
+		client.connect();
+	}
+
+	@Test(expected = JedisConnectionException.class)
+	public void checkWrongPort() {
+		client.setHost("localhost");
+		client.setPort(55665);
+		client.connect();
+	}
+
+	@Test
+	public void connectIfNotConnectedWhenSettingTimeoutInfinite() {
+		client.setHost("localhost");
+		client.setPort(6379);
+		client.setTimeoutInfinite();
+	}
+}

src/test/java/redis/clients/jedis/tests/JedisPoolTest.java

@@ -27,6 +27,21 @@ public class JedisPoolTest extends Assert {
 	assertEquals("bar", jedis.get("foo"));
 	pool.returnResource(jedis);
 	pool.destroy();
+	assertTrue(pool.isClosed());
+    }
+
+    @Test
+    public void checkCloseableConnections() throws Exception {
+	Closer closer = new Closer();
+	JedisPool pool = closer.register(new JedisPool(new JedisPoolConfig(), hnp.getHost(),
+		     hnp.getPort(), 2000));
+	Jedis jedis = pool.getResource();
+	jedis.auth("foobared");
+	jedis.set("foo", "bar");
+	assertEquals("bar", jedis.get("foo"));
+	pool.returnResource(jedis);
+	closer.close();
+	assertTrue(pool.isClosed());
     }
 
     @Test
@@ -39,6 +54,7 @@ public class JedisPoolTest extends Assert {
 	assertEquals("bar", jedis.get("foo"));
 	pool.returnResource(jedis);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 
     @Test
@@ -56,6 +72,7 @@ public class JedisPoolTest extends Assert {
 	jedis.incr("foo");
 	pool.returnResource(jedis);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 
     @Test
@@ -72,6 +89,7 @@ public class JedisPoolTest extends Assert {
 	jedis.incr("foo");
 	pool.returnResource(jedis);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 
     @Test(expected = JedisConnectionException.class)
@@ -99,6 +117,7 @@ public class JedisPoolTest extends Assert {
 	jedis.set("foo", "bar");
 	pool.returnResource(jedis);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 
     @Test
@@ -110,6 +129,7 @@ public class JedisPoolTest extends Assert {
 	assertEquals("bar", jedis0.get("foo"));
 	pool0.returnResource(jedis0);
 	pool0.destroy();
+	assertTrue(pool0.isClosed());
 
 	JedisPool pool1 = new JedisPool(new JedisPoolConfig(), hnp.getHost(),
 		hnp.getPort(), 2000, "foobared", 1);
@@ -117,6 +137,7 @@ public class JedisPoolTest extends Assert {
 	assertNull(jedis1.get("foo"));
 	pool1.returnResource(jedis1);
 	pool1.destroy();
+	assertTrue(pool1.isClosed());
     }
 
     @Test
@@ -163,6 +184,7 @@ public class JedisPoolTest extends Assert {
 
 	pool.returnResource(jedis1);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 
     @Test
@@ -176,6 +198,7 @@ public class JedisPoolTest extends Assert {
 
 	pool0.returnResource(jedis);
 	pool0.destroy();
+	assertTrue(pool0.isClosed());
     }
 
     @Test
@@ -197,5 +220,6 @@ public class JedisPoolTest extends Assert {
 	assertEquals("jedis", jedis2.get("hello"));
 	pool.returnResource(jedis2);
 	pool.destroy();
+	assertTrue(pool.isClosed());
     }
 }