| /* |
| * 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.maven.execution.scope.internal; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.IdentityHashMap; |
| import java.util.LinkedList; |
| import java.util.Map; |
| |
| import com.google.inject.Key; |
| import com.google.inject.OutOfScopeException; |
| import com.google.inject.Provider; |
| import com.google.inject.Scope; |
| import com.google.inject.util.Providers; |
| import org.apache.maven.execution.MojoExecutionEvent; |
| import org.apache.maven.execution.MojoExecutionListener; |
| import org.apache.maven.execution.scope.WeakMojoExecutionListener; |
| import org.apache.maven.plugin.MojoExecutionException; |
| |
| /** |
| * MojoExecutionScope |
| */ |
| public class MojoExecutionScope implements Scope, MojoExecutionListener { |
| private static final Provider<Object> SEEDED_KEY_PROVIDER = () -> { |
| throw new IllegalStateException(); |
| }; |
| |
| private static final class ScopeState { |
| private final Map<Key<?>, Provider<?>> seeded = new HashMap<>(); |
| |
| private final Map<Key<?>, Object> provided = new HashMap<>(); |
| } |
| |
| private final ThreadLocal<LinkedList<ScopeState>> values = new ThreadLocal<>(); |
| |
| public MojoExecutionScope() {} |
| |
| public void enter() { |
| LinkedList<ScopeState> stack = values.get(); |
| if (stack == null) { |
| stack = new LinkedList<>(); |
| values.set(stack); |
| } |
| stack.addFirst(new ScopeState()); |
| } |
| |
| private ScopeState getScopeState() { |
| LinkedList<ScopeState> stack = values.get(); |
| if (stack == null || stack.isEmpty()) { |
| throw new IllegalStateException(); |
| } |
| return stack.getFirst(); |
| } |
| |
| public void exit() throws MojoExecutionException { |
| final LinkedList<ScopeState> stack = values.get(); |
| if (stack == null || stack.isEmpty()) { |
| throw new IllegalStateException(); |
| } |
| stack.removeFirst(); |
| if (stack.isEmpty()) { |
| values.remove(); |
| } |
| } |
| |
| public <T> void seed(Class<T> clazz, Provider<T> value) { |
| getScopeState().seeded.put(Key.get(clazz), value); |
| } |
| |
| public <T> void seed(Class<T> clazz, final T value) { |
| getScopeState().seeded.put(Key.get(clazz), Providers.of(value)); |
| } |
| |
| public <T> Provider<T> scope(final Key<T> key, final Provider<T> unscoped) { |
| return () -> { |
| LinkedList<ScopeState> stack = values.get(); |
| if (stack == null || stack.isEmpty()) { |
| throw new OutOfScopeException("Cannot access " + key + " outside of a scoping block"); |
| } |
| |
| ScopeState state = stack.getFirst(); |
| |
| Provider<?> seeded = state.seeded.get(key); |
| |
| if (seeded != null) { |
| return (T) seeded.get(); |
| } |
| |
| T provided = (T) state.provided.get(key); |
| if (provided == null && unscoped != null) { |
| provided = unscoped.get(); |
| state.provided.put(key, provided); |
| } |
| |
| return provided; |
| }; |
| } |
| |
| @SuppressWarnings({"unchecked"}) |
| public static <T> Provider<T> seededKeyProvider() { |
| return (Provider<T>) SEEDED_KEY_PROVIDER; |
| } |
| |
| public void beforeMojoExecution(MojoExecutionEvent event) throws MojoExecutionException { |
| for (WeakMojoExecutionListener provided : getProvidedListeners()) { |
| provided.beforeMojoExecution(event); |
| } |
| } |
| |
| public void afterMojoExecutionSuccess(MojoExecutionEvent event) throws MojoExecutionException { |
| for (WeakMojoExecutionListener provided : getProvidedListeners()) { |
| provided.afterMojoExecutionSuccess(event); |
| } |
| } |
| |
| public void afterExecutionFailure(MojoExecutionEvent event) { |
| for (WeakMojoExecutionListener provided : getProvidedListeners()) { |
| provided.afterExecutionFailure(event); |
| } |
| } |
| |
| private Collection<WeakMojoExecutionListener> getProvidedListeners() { |
| // the same instance can be provided multiple times under different Key's |
| // deduplicate instances to avoid redundant beforeXXX/afterXXX callbacks |
| IdentityHashMap<WeakMojoExecutionListener, Object> listeners = new IdentityHashMap<>(); |
| for (Object provided : getScopeState().provided.values()) { |
| if (provided instanceof WeakMojoExecutionListener) { |
| listeners.put((WeakMojoExecutionListener) provided, null); |
| } |
| } |
| return listeners.keySet(); |
| } |
| } |