| /******************************************************************************* |
| * Copyright (c) 2009, 2017 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.osgi.tests.util; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.eclipse.core.tests.harness.CoreTest; |
| import org.eclipse.osgi.framework.util.ObjectPool; |
| import org.osgi.framework.Version; |
| |
| public class ObjectPoolTestCase extends CoreTest { |
| public void testObjectPool01() { |
| // Tests ObjectPool with strings only |
| List objects = new ArrayList(); |
| int num = 2000; |
| // new objects are added to the object pool; interning should add the object to the pool and return the same object |
| for (int i = 0; i < num; i++) { |
| String test1 = getName() + "_" + i; //$NON-NLS-1$ |
| String test2 = ObjectPool.intern(test1); |
| assertTrue("Strings are not the same: " + test1, test1 == test2); //$NON-NLS-1$ |
| objects.add(test2); |
| } |
| doGC(); |
| // after doing a GC the interned objects should still be in the pool; interning a duplicate should return the objects that were added above |
| for (int i = 0; i < num; i++) { |
| String test1 = getName() + "_" + i; //$NON-NLS-1$ |
| String test2 = ObjectPool.intern(test1); |
| assertFalse("Strings are the same: " + test1, test1 == test2); //$NON-NLS-1$ |
| assertTrue("Strings are not the same: " + test1, test2 == objects.get(i)); //$NON-NLS-1$ |
| } |
| // clear the hard references to the interned objects |
| objects.clear(); |
| doGC(); |
| // after doing a GC the interned objects should have been removed from the object pool |
| for (int i = 0; i < num; i++) { |
| String test1 = getName() + "_" + i; //$NON-NLS-1$ |
| String test2 = ObjectPool.intern(test1); |
| assertTrue("Strings are not the same: " + test1, test1 == test2); //$NON-NLS-1$ |
| objects.add(test2); |
| } |
| // flush out the objects again. |
| objects.clear(); |
| doGC(); |
| } |
| |
| public void testObjectPool02() { |
| // Test both strings and versions |
| List strings = new ArrayList(); |
| List versions = new ArrayList(); |
| int num = 2000; |
| // new objects are added to the object pool; interning should add the object to the pool and return the same object |
| for (int i = 0; i < num; i++) { |
| String testString1 = getName() + "_" + i; //$NON-NLS-1$ |
| String testString2 = ObjectPool.intern(testString1); |
| assertTrue("Strings are not the same: " + testString1, testString1 == testString2); //$NON-NLS-1$ |
| strings.add(testString2); |
| Version testVersion1 = new Version(i, i, i, getName() + "_" + i); //$NON-NLS-1$ |
| Version testVersion2 = ObjectPool.intern(testVersion1); |
| assertTrue("Versions are not the same: " + testVersion1, testVersion1 == testVersion2); //$NON-NLS-1$ |
| versions.add(testVersion2); |
| } |
| doGC(); |
| // after doing a GC the interned objects should still be in the pool; interning a duplicate should return the objects that were added above |
| for (int i = 0; i < num; i++) { |
| String testString1 = getName() + "_" + i; //$NON-NLS-1$ |
| String testString2 = ObjectPool.intern(testString1); |
| assertFalse("Strings are the same: " + testString1, testString1 == testString2); //$NON-NLS-1$ |
| assertTrue("Strings are not the same: " + testString1, testString2 == strings.get(i)); //$NON-NLS-1$ |
| Version testVersion1 = new Version(i, i, i, getName() + "_" + i); //$NON-NLS-1$ |
| Version testVersion2 = ObjectPool.intern(testVersion1); |
| assertFalse("Versions are the same: " + testVersion1, testVersion1 == testVersion2); //$NON-NLS-1$ |
| assertTrue("Versions are not the same: " + testVersion1, testVersion2 == versions.get(i)); //$NON-NLS-1$ |
| } |
| // clear the hard references to the interned objects |
| strings.clear(); |
| versions.clear(); |
| // after doing a GC the interned objects should have been removed from the object pool |
| doGC(); |
| for (int i = 0; i < num; i++) { |
| String testString1 = getName() + "_" + i; //$NON-NLS-1$ |
| String testString2 = ObjectPool.intern(testString1); |
| assertTrue("Strings are not the same: " + testString1, testString1 == testString2); //$NON-NLS-1$ |
| strings.add(testString2); |
| Version testVersion1 = new Version(i, i, i, getName() + "_" + i); //$NON-NLS-1$ |
| Version testVersion2 = ObjectPool.intern(testVersion1); |
| assertTrue("Versions are not the same: " + testVersion1, testVersion1 == testVersion2); //$NON-NLS-1$ |
| versions.add(testVersion2); |
| } |
| // flush out the objects again. |
| strings.clear(); |
| versions.clear(); |
| doGC(); |
| } |
| |
| private static void doGC() { |
| // We go through great effort to force the VM to throw our weakly referenced objects away. |
| System.gc(); |
| System.runFinalization(); |
| System.gc(); |
| System.runFinalization(); |
| } |
| } |