001 /*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2008-2017 the original author or authors.
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.codehaus.griffon.runtime.injection;
019
020 import com.google.inject.Binding;
021 import com.google.inject.Injector;
022 import org.codehaus.griffon.runtime.core.injection.InjectionUnitOfWork;
023
024 import javax.annotation.Nonnull;
025 import javax.annotation.PreDestroy;
026 import java.util.ArrayList;
027 import java.util.Collections;
028 import java.util.LinkedHashMap;
029 import java.util.List;
030 import java.util.Map;
031
032 import static com.google.inject.Scopes.isSingleton;
033 import static griffon.util.GriffonClassUtils.hasMethodAnnotatedwith;
034 import static griffon.util.GriffonClassUtils.invokeAnnotatedMethod;
035 import static java.util.Collections.synchronizedMap;
036 import static java.util.Objects.requireNonNull;
037
038 /**
039 * @author Andres Almiray
040 * @since 2.6.0
041 */
042 class InstanceTracker {
043 private static final String ERROR_INSTANCE_NULL = "Argument 'instance' must not be null";
044 private static final String ERROR_BINDING_NULL = "Argument 'binding' must not be null";
045
046 private final Map<Object, Binding<?>> instanceToKeyMap = synchronizedMap(new LinkedHashMap<Object, Binding<?>>());
047
048 private com.google.inject.Injector injector;
049
050 public void setInjector(@Nonnull Injector injector) {
051 this.injector = injector;
052 }
053
054 @Nonnull
055 public Injector getInjector() {
056 return injector;
057 }
058
059 @Nonnull
060 public <T> T track(@Nonnull Binding<?> binding, @Nonnull final T instance) {
061 requireNonNull(binding, ERROR_BINDING_NULL);
062 requireNonNull(instance, ERROR_INSTANCE_NULL);
063
064 if (hasMethodAnnotatedwith(instance, PreDestroy.class)) {
065 if (isSingleton(binding)) {
066 instanceToKeyMap.put(instance, binding);
067 } else {
068 try {
069 InjectionUnitOfWork.track(instance);
070 } catch (IllegalStateException ise) {
071 instanceToKeyMap.put(instance, binding);
072 }
073 }
074 }
075 return instance;
076 }
077
078 public <T> void release(@Nonnull T instance) {
079 requireNonNull(instance, ERROR_INSTANCE_NULL);
080
081 invokeAnnotatedMethod(instance, PreDestroy.class);
082
083 Binding<?> binding = instanceToKeyMap.get(instance);
084 if (binding != null) {
085 instanceToKeyMap.remove(instance);
086 }
087 }
088
089 public void releaseAll() {
090 List<Object> instances = new ArrayList<>();
091
092 instances.addAll(instanceToKeyMap.keySet());
093 instanceToKeyMap.clear();
094
095 Collections.reverse(instances);
096
097 for (Object instance : instances) {
098 invokeAnnotatedMethod(instance, PreDestroy.class);
099 }
100
101 instances.clear();
102 }
103 }
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