| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| package com.sun.star.lib.uno.bridges.javaremote; |
| |
| import com.sun.star.bridge.XInstanceProvider; |
| import com.sun.star.lib.TestBed; |
| import com.sun.star.lib.uno.typeinfo.MethodTypeInfo; |
| import com.sun.star.lib.uno.typeinfo.TypeInfo; |
| import com.sun.star.uno.UnoRuntime; |
| import com.sun.star.uno.XComponentContext; |
| import com.sun.star.uno.XInterface; |
| import complexlib.ComplexTestCase; |
| |
| /** |
| * Test case for bug #108825#. |
| * |
| * <p>Bug #108825# "Java UNO Remote Bridge: Mapped-out Objects Not Held" shows |
| * that local objects that are mapped out via a remote bridge, but not held |
| * locally, might be garbage collected while there are still remote references |
| * to them. This test is not guaranteed to always work reliably, see comment in |
| * the code.</p> |
| */ |
| public final class Bug108825_Test extends ComplexTestCase { |
| public String getTestObjectName() { |
| return getClass().getName(); |
| } |
| |
| public String[] getTestMethodNames() { |
| return new String[] { "test" }; |
| } |
| |
| public void test() throws Exception { |
| TestBed t = new TestBed(); |
| assure("test", t.execute(new Provider(t), true, Client.class, 0)); |
| } |
| |
| public static final class Client extends TestBed.Client { |
| public static void main(String[] args) { |
| new Client().execute(); |
| } |
| |
| protected boolean run(XComponentContext context) throws Throwable { |
| XTest test = UnoRuntime.queryInterface( |
| XTest.class, getBridge(context).getInstance("Test")); |
| // Send the XObject that is held on the server side amidst two |
| // dummies that are not held on the server side; then wait for the |
| // dummies to be garbage collected, hoping that the XObject, if it |
| // is erroneously not held on the client side, will be garbage |
| // collected, too. Obviously, this is not guaranteed to always work |
| // (the VM might chose not to garbage collect the dummies, hanging |
| // the test forever; or the VM might chose to garbage collect the |
| // dummies but not the XObject, making the test pass erroneously). |
| test.offer(new Dummy(), new XObject() { public void call() {} }, |
| new Dummy()); |
| System.out.println("Client waiting for garbage collection..."); |
| for (;;) { |
| synchronized (lock) { |
| if (finalizedCount == 2) { |
| break; |
| } |
| } |
| test.remoteGc(); |
| gc(); |
| } |
| System.out.println("Client garbage collection done."); |
| test.notification(); |
| return true; |
| } |
| |
| private final class Dummy implements XDummy { |
| protected void finalize() { |
| synchronized (lock) { |
| ++finalizedCount; |
| } |
| } |
| } |
| |
| private final Object lock = new Object(); |
| private int finalizedCount = 0; |
| } |
| |
| // Make it as likely as possible that the VM reclaims all garbage: |
| private static void gc() { |
| System.gc(); |
| System.runFinalization(); |
| byte[] garbage = new byte[1024 * 1024]; |
| } |
| |
| private static final class Provider implements XInstanceProvider { |
| public Provider(TestBed testBed) { |
| this.testBed = testBed; |
| } |
| |
| public Object getInstance(String instanceName) { |
| return new XTest() { |
| public void offer(XDummy dummy1, XObject obj, XDummy dummy2) |
| { |
| this.obj = obj; |
| } |
| |
| public void remoteGc() { |
| gc(); |
| } |
| |
| public void notification() { |
| obj.call(); |
| testBed.serverDone(true); |
| } |
| |
| private XObject obj; |
| }; |
| } |
| |
| private final TestBed testBed; |
| } |
| |
| public interface XDummy extends XInterface { |
| TypeInfo[] UNOTYPEINFO = null; |
| } |
| |
| public interface XObject extends XInterface { |
| void call(); |
| |
| TypeInfo[] UNOTYPEINFO = { new MethodTypeInfo("call", 0, 0) }; |
| } |
| |
| public interface XTest extends XInterface { |
| void offer(XDummy dummy1, XObject obj, XDummy dummy2); |
| |
| void remoteGc(); |
| |
| void notification(); |
| |
| TypeInfo[] UNOTYPEINFO = { new MethodTypeInfo("offer", 0, 0), |
| new MethodTypeInfo("remoteGc", 1, 0), |
| new MethodTypeInfo("notification", 2, 0) }; |
| } |
| } |