| /* |
| * 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 org.apache.ace.deployment.provider.repositorybased; |
| |
| import java.lang.reflect.Field; |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.ace.deployment.provider.OverloadedException; |
| import org.apache.ace.repository.Repository; |
| import org.apache.ace.test.utils.TestUtils; |
| import org.osgi.service.log.LogService; |
| import org.testng.annotations.BeforeMethod; |
| import org.testng.annotations.Test; |
| |
| public class RepositoryBasedProviderConcurrencyTest { |
| |
| private final String TARGET = "target"; |
| |
| private RepositoryBasedProvider m_backend; |
| private Semaphore m_semaphore; |
| private Exception m_exception; |
| |
| @BeforeMethod(alwaysRun = true) |
| protected void setUp() throws Exception { |
| // setup mock repository |
| m_semaphore = new Semaphore(0); |
| MockDeploymentRepository repository = new MockDeploymentRepository("", null, m_semaphore); |
| m_backend = new RepositoryBasedProvider(); |
| TestUtils.configureObject(m_backend, Repository.class, repository); |
| TestUtils.configureObject(m_backend, LogService.class); |
| } |
| |
| @Test() |
| public void testNoConcurrentUsersAllowed() throws Exception { |
| // -1 number of users makes sure nobody can use the repository |
| setConfigurationForUsers(-1); |
| try { |
| m_backend.getVersions(TARGET); |
| assert false : "Expected an overloaded exception"; |
| } |
| catch (OverloadedException oe) { |
| assert true; |
| } |
| catch (Throwable t) { |
| assert false : "Unknown exception"; |
| } |
| } |
| |
| @Test() |
| public void testConcurrentUsersWithLimit() throws Exception { |
| setConfigurationForUsers(1); |
| new Thread() { |
| public void run() { |
| try { |
| m_backend.getVersions(TARGET); |
| } |
| catch (Exception e) { |
| m_exception = e; |
| } |
| } |
| }.start(); |
| |
| try { |
| boolean acquire = m_semaphore.tryAcquire(1, 1, TimeUnit.SECONDS); |
| assert acquire : "Could not acquire semaphore, no concurrent threads ?"; |
| m_backend.getVersions(TARGET); |
| assert false : "Expected an overloaded exception"; |
| } |
| catch (OverloadedException oe) { |
| assert true; |
| } |
| |
| assert m_exception == null : "No Exception expected"; |
| } |
| |
| @Test() |
| public void testConcurrentUsersWithoutLimit() throws Exception { |
| // Because it's hard to test for unlimited users we'll just try 2 concurrent threads. |
| setConfigurationForUsers(0); |
| new Thread() { |
| public void run() { |
| try { |
| m_backend.getVersions(TARGET); |
| } |
| catch (Exception e) { |
| m_exception = e; |
| } |
| } |
| }.start(); |
| |
| m_semaphore.tryAcquire(1, 1, TimeUnit.SECONDS); |
| m_backend.getVersions(TARGET); |
| assert true; |
| |
| assert m_exception == null : "No Exception expected"; |
| } |
| |
| private void setConfigurationForUsers(int numberOfConcurrentUsers) throws Exception { |
| // setting a new configuration on the repository also creates a cache repository etc. This way only the max |
| // users is changed. |
| Field field = m_backend.getClass().getDeclaredField("m_maximumNumberOfUsers"); |
| field.setAccessible(true); |
| field.set(m_backend, new Integer(numberOfConcurrentUsers)); |
| } |
| } |