001 /*
002 * Copyright 2008-2017 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 griffon.util.GriffonClassUtils.hasMethodAnnotatedwith;
032 import static griffon.util.GriffonClassUtils.invokeAnnotatedMethod;
033 import static java.util.Collections.synchronizedMap;
034 import static java.util.Objects.requireNonNull;
035
036 /**
037 * @author Andres Almiray
038 * @since 2.6.0
039 */
040 class InstanceTracker {
041 private static final String ERROR_INSTANCE_NULL = "Argument 'instance' must not be null";
042 private static final String ERROR_BINDING_NULL = "Argument 'binding' must not be null";
043
044 private final Map<Object, Binding<?>> instanceToKeyMap = synchronizedMap(new LinkedHashMap<Object, Binding<?>>());
045
046 private com.google.inject.Injector injector;
047
048 public void setInjector(@Nonnull Injector injector) {
049 this.injector = injector;
050 }
051
052 @Nonnull
053 public Injector getInjector() {
054 return injector;
055 }
056
057 @Nonnull
058 public <T> T track(@Nonnull Binding<?> binding, @Nonnull final T instance) {
059 requireNonNull(binding, ERROR_BINDING_NULL);
060 requireNonNull(instance, ERROR_INSTANCE_NULL);
061
062 if (hasMethodAnnotatedwith(instance, PreDestroy.class)) {
063 if (isSingleton(binding)) {
064 instanceToKeyMap.put(instance, binding);
065 } else {
066 try {
067 InjectionUnitOfWork.track(instance);
068 } catch (IllegalStateException ise) {
069 instanceToKeyMap.put(instance, binding);
070 }
071 }
072 }
073 return instance;
074 }
075
076 public <T> void release(@Nonnull T instance) {
077 requireNonNull(instance, ERROR_INSTANCE_NULL);
078
079 invokeAnnotatedMethod(instance, PreDestroy.class);
080
081 Binding<?> binding = instanceToKeyMap.get(instance);
082 if (binding != null) {
083 instanceToKeyMap.remove(instance);
084 }
085 }
086
087 public void releaseAll() {
088 List<Object> instances = new ArrayList<>();
089
090 instances.addAll(instanceToKeyMap.keySet());
091 instanceToKeyMap.clear();
092
093 Collections.reverse(instances);
094
095 for (Object instance : instances) {
096 invokeAnnotatedMethod(instance, PreDestroy.class);
097 }
098
099 instances.clear();
100 }
101 }
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