001 /*
002 * Copyright 2008-2016 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.codehaus.griffon.runtime.injection;
017
018 import com.google.inject.Binding;
019 import com.google.inject.Injector;
020 import org.codehaus.griffon.runtime.core.injection.InjectionUnitOfWork;
021
022 import javax.annotation.Nonnull;
023 import javax.annotation.PreDestroy;
024 import java.util.ArrayList;
025 import java.util.Collections;
026 import java.util.LinkedHashMap;
027 import java.util.List;
028 import java.util.Map;
029
030 import static com.google.inject.Scopes.isSingleton;
031 import static java.util.Collections.synchronizedMap;
032 import static java.util.Objects.requireNonNull;
033 import static org.codehaus.griffon.runtime.injection.MethodUtils.invokeAnnotatedMethod;
034
035 /**
036 * @author Andres Almiray
037 * @since 2.6.0
038 */
039 class InstanceTracker {
040 private static final String ERROR_INSTANCE_NULL = "Argument 'instance' must not be null";
041 private static final String ERROR_BINDING_NULL = "Argument 'binding' must not be null";
042
043 private final Map<Object, Binding<?>> instanceToKeyMap = synchronizedMap(new LinkedHashMap<Object, Binding<?>>());
044
045 private com.google.inject.Injector injector;
046
047 public void setInjector(@Nonnull Injector injector) {
048 this.injector = injector;
049 }
050
051 @Nonnull
052 public Injector getInjector() {
053 return injector;
054 }
055
056 @Nonnull
057 public <T> T track(@Nonnull Binding<?> binding, final @Nonnull T instance) {
058 requireNonNull(binding, ERROR_BINDING_NULL);
059 requireNonNull(instance, ERROR_INSTANCE_NULL);
060
061 if (MethodUtils.hasMethodAnnotatedwith(instance, PreDestroy.class)) {
062 if (isSingleton(binding)) {
063 instanceToKeyMap.put(instance, binding);
064 } else {
065 try {
066 InjectionUnitOfWork.track(instance);
067 } catch (IllegalStateException ise) {
068 instanceToKeyMap.put(instance, binding);
069 }
070 }
071 }
072 return instance;
073 }
074
075 public <T> void release(@Nonnull T instance) {
076 requireNonNull(instance, ERROR_INSTANCE_NULL);
077
078 invokeAnnotatedMethod(instance, PreDestroy.class);
079
080 Binding<?> binding = instanceToKeyMap.get(instance);
081 if (binding != null) {
082 instanceToKeyMap.remove(instance);
083 }
084 }
085
086 public void releaseAll() {
087 List<Object> instances = new ArrayList<>();
088
089 instances.addAll(instanceToKeyMap.keySet());
090 instanceToKeyMap.clear();
091
092 Collections.reverse(instances);
093
094 for (Object instance : instances) {
095 invokeAnnotatedMethod(instance, PreDestroy.class);
096 }
097
098 instances.clear();
099 }
100 }
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