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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.ambari.server.stack;
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+
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+import java.io.File;
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+import java.util.HashMap;
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+import java.util.Map;
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+import java.util.concurrent.locks.Lock;
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+import java.util.concurrent.locks.ReentrantLock;
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+import javax.annotation.Nullable;
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+
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+import org.apache.ambari.server.AmbariException;
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+import org.apache.ambari.server.metadata.ActionMetadata;
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+import org.apache.ambari.server.orm.dao.ExtensionDAO;
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+import org.apache.ambari.server.orm.dao.ExtensionLinkDAO;
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+import org.apache.ambari.server.orm.dao.MetainfoDAO;
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+import org.apache.ambari.server.orm.dao.StackDAO;
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+import org.apache.ambari.server.state.StackInfo;
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+import org.apache.ambari.server.state.stack.OsFamily;
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+
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+import com.google.inject.Inject;
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+import com.google.inject.assistedinject.Assisted;
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+
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+/**
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+ * Directory tree rescans and stack modules parsing take much time on every module init.
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+ * This class enhances {@code}StackManager{@code} to reuse already parsed modules.
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+ */
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+public class StackManagerMock extends StackManager {
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+
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+ // Ensure correct behavior during the parallel test execution.
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+ private static final Lock lock = new ReentrantLock();
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+
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+ // Some tests use different stack locations.
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+ private static final Map<ModulesPathsKey, CachedModules> pathsToCachedModulesMap = new HashMap<>();
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+
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+ public static void invalidateKey(File stackRoot, File commonServicesRoot, File extensionRoot) {
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+ ModulesPathsKey pathsKey = new ModulesPathsKey(stackRoot, commonServicesRoot, extensionRoot);
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+ pathsToCachedModulesMap.remove(pathsKey);
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+ }
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+
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+ // Paths for this instance.
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+ private File currentStackRoot;
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+ private File currentCommonServicesRoot;
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+ private File currentExtensionRoot;
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+
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+ public void invalidateCurrentPaths() {
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+ invalidateKey(currentStackRoot, currentCommonServicesRoot, currentExtensionRoot);
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+ }
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+
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+ private static class ModulesPathsKey {
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+ private String stackRoot;
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+ private String commonServicesRoot;
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+ private String extensionRoot;
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+
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+ public ModulesPathsKey(File stackRoot, File commonServicesRoot, File extensionRoot) {
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+ this.stackRoot = stackRoot == null ? "" : stackRoot.getPath();
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+ this.commonServicesRoot = commonServicesRoot == null ? "" : commonServicesRoot.getPath();
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+ this.extensionRoot = extensionRoot == null ? "" : extensionRoot.getPath();
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+ }
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+
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+ @Override
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+ public boolean equals(Object o) {
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+ if (this == o) return true;
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+ if (o == null || getClass() != o.getClass()) return false;
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+
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+ ModulesPathsKey that = (ModulesPathsKey) o;
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+
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+ if (stackRoot != null ? !stackRoot.equals(that.stackRoot) : that.stackRoot != null) return false;
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+ if (commonServicesRoot != null ? !commonServicesRoot.equals(that.commonServicesRoot) : that.commonServicesRoot != null)
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+ return false;
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+ return !(extensionRoot != null ? !extensionRoot.equals(that.extensionRoot) : that.extensionRoot != null);
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+
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+ }
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+
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+ @Override
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+ public int hashCode() {
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+ int result = stackRoot != null ? stackRoot.hashCode() : 0;
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+ result = 31 * result + (commonServicesRoot != null ? commonServicesRoot.hashCode() : 0);
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+ result = 31 * result + (extensionRoot != null ? extensionRoot.hashCode() : 0);
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+ return result;
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+ }
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+ }
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+
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+ private static class CachedModules {
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+ private Map<String, ServiceModule> cachedCommonServiceModules;
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+ private Map<String, StackModule> cachedStackModules;
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+ private Map<String, ExtensionModule> cachedExtensionModules;
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+ private Map<String, StackInfo> cachedStackMap;
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+
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+ public CachedModules(Map<String, ServiceModule> cachedCommonServiceModules, Map<String, StackModule> cachedStackModules,
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+ Map<String, ExtensionModule> cachedExtensionModules, Map<String, StackInfo> cachedStackMap) {
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+ this.cachedCommonServiceModules = cachedCommonServiceModules;
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+ this.cachedStackModules = cachedStackModules;
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+ this.cachedExtensionModules = cachedExtensionModules;
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+ this.cachedStackMap = cachedStackMap;
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+ }
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+
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+ public Map<String, ServiceModule> getCachedCommonServiceModules() {
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+ return cachedCommonServiceModules;
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+ }
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+
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+ public Map<String, StackModule> getCachedStackModules() {
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+ return cachedStackModules;
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+ }
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+
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+ public Map<String, ExtensionModule> getCachedExtensionModules() {
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+ return cachedExtensionModules;
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+ }
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+
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+ public Map<String, StackInfo> getCachedStackMap() {
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+ return cachedStackMap;
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+ }
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+ }
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+
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+ @Inject
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+ public StackManagerMock(@Assisted("stackRoot") File stackRoot, @Nullable @Assisted("commonServicesRoot")
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+ File commonServicesRoot, @Assisted("extensionRoot") @Nullable File extensionRoot,
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+ @Assisted OsFamily osFamily, @Assisted boolean validate, MetainfoDAO metaInfoDAO,
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+ ActionMetadata actionMetadata, StackDAO stackDao, ExtensionDAO extensionDao,
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+ ExtensionLinkDAO linkDao) throws AmbariException {
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+ super(stackRoot, commonServicesRoot, extensionRoot, osFamily, validate, metaInfoDAO, actionMetadata, stackDao, extensionDao, linkDao);
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+ currentStackRoot = stackRoot;
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+ currentCommonServicesRoot = commonServicesRoot;
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+ currentExtensionRoot = extensionRoot;
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+ }
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+
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+ @Override
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+ protected void parseDirectories(File stackRoot, File commonServicesRoot, File extensionRoot) throws AmbariException {
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+ try {
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+ // Ensure correct behavior during the parallel test execution.
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+ lock.lock();
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+
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+ ModulesPathsKey pathsKey = new ModulesPathsKey(stackRoot, commonServicesRoot, extensionRoot);
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+ CachedModules cachedModules = pathsToCachedModulesMap.get(pathsKey);
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+
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+ if (cachedModules == null) {
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+ super.parseDirectories(stackRoot, commonServicesRoot, extensionRoot);
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+ CachedModules newEntry = new CachedModules(commonServiceModules, stackModules, extensionModules, stackMap);
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+ pathsToCachedModulesMap.put(pathsKey, newEntry);
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+ } else {
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+ commonServiceModules = cachedModules.getCachedCommonServiceModules();
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+ stackModules = cachedModules.getCachedStackModules();
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+ extensionModules = cachedModules.getCachedExtensionModules();
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+ stackMap = cachedModules.getCachedStackMap();
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+ }
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+ } finally {
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+ lock.unlock();
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+ }
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+ }
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+}
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Andrew Onishuk