001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  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,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.eclipse.aether.internal.impl;
020
021import javax.inject.Inject;
022import javax.inject.Named;
023import javax.inject.Singleton;
024
025import java.util.ArrayList;
026import java.util.Collection;
027import java.util.Set;
028
029import org.eclipse.aether.RepositoryEvent;
030import org.eclipse.aether.RepositoryListener;
031import org.eclipse.aether.impl.RepositoryEventDispatcher;
032import org.eclipse.aether.spi.locator.Service;
033import org.eclipse.aether.spi.locator.ServiceLocator;
034import org.slf4j.Logger;
035import org.slf4j.LoggerFactory;
036
037import static java.util.Objects.requireNonNull;
038
039/**
040 */
041@Singleton
042@Named
043public class DefaultRepositoryEventDispatcher implements RepositoryEventDispatcher, Service {
044
045    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultRepositoryEventDispatcher.class);
046
047    private Collection<RepositoryListener> listeners = new ArrayList<>();
048
049    @Deprecated
050    public DefaultRepositoryEventDispatcher() {
051        // enables no-arg constructor
052    }
053
054    @Inject
055    public DefaultRepositoryEventDispatcher(Set<RepositoryListener> listeners) {
056        setRepositoryListeners(listeners);
057    }
058
059    public DefaultRepositoryEventDispatcher addRepositoryListener(RepositoryListener listener) {
060        this.listeners.add(requireNonNull(listener, "repository listener cannot be null"));
061        return this;
062    }
063
064    public DefaultRepositoryEventDispatcher setRepositoryListeners(Collection<RepositoryListener> listeners) {
065        if (listeners == null) {
066            this.listeners = new ArrayList<>();
067        } else {
068            this.listeners = listeners;
069        }
070        return this;
071    }
072
073    public void initService(ServiceLocator locator) {
074        setRepositoryListeners(locator.getServices(RepositoryListener.class));
075    }
076
077    public void dispatch(RepositoryEvent event) {
078        requireNonNull(event, "event cannot be null");
079        if (!listeners.isEmpty()) {
080            for (RepositoryListener listener : listeners) {
081                dispatch(event, listener);
082            }
083        }
084
085        RepositoryListener listener = event.getSession().getRepositoryListener();
086
087        if (listener != null) {
088            dispatch(event, listener);
089        }
090    }
091
092    private void dispatch(RepositoryEvent event, RepositoryListener listener) {
093        try {
094            switch (event.getType()) {
095                case ARTIFACT_DEPLOYED:
096                    listener.artifactDeployed(event);
097                    break;
098                case ARTIFACT_DEPLOYING:
099                    listener.artifactDeploying(event);
100                    break;
101                case ARTIFACT_DESCRIPTOR_INVALID:
102                    listener.artifactDescriptorInvalid(event);
103                    break;
104                case ARTIFACT_DESCRIPTOR_MISSING:
105                    listener.artifactDescriptorMissing(event);
106                    break;
107                case ARTIFACT_DOWNLOADED:
108                    listener.artifactDownloaded(event);
109                    break;
110                case ARTIFACT_DOWNLOADING:
111                    listener.artifactDownloading(event);
112                    break;
113                case ARTIFACT_INSTALLED:
114                    listener.artifactInstalled(event);
115                    break;
116                case ARTIFACT_INSTALLING:
117                    listener.artifactInstalling(event);
118                    break;
119                case ARTIFACT_RESOLVED:
120                    listener.artifactResolved(event);
121                    break;
122                case ARTIFACT_RESOLVING:
123                    listener.artifactResolving(event);
124                    break;
125                case METADATA_DEPLOYED:
126                    listener.metadataDeployed(event);
127                    break;
128                case METADATA_DEPLOYING:
129                    listener.metadataDeploying(event);
130                    break;
131                case METADATA_DOWNLOADED:
132                    listener.metadataDownloaded(event);
133                    break;
134                case METADATA_DOWNLOADING:
135                    listener.metadataDownloading(event);
136                    break;
137                case METADATA_INSTALLED:
138                    listener.metadataInstalled(event);
139                    break;
140                case METADATA_INSTALLING:
141                    listener.metadataInstalling(event);
142                    break;
143                case METADATA_INVALID:
144                    listener.metadataInvalid(event);
145                    break;
146                case METADATA_RESOLVED:
147                    listener.metadataResolved(event);
148                    break;
149                case METADATA_RESOLVING:
150                    listener.metadataResolving(event);
151                    break;
152                default:
153                    throw new IllegalStateException("unknown repository event type " + event.getType());
154            }
155        } catch (Exception | LinkageError e) {
156            logError(e, listener);
157        }
158    }
159
160    private void logError(Throwable e, Object listener) {
161        LOGGER.warn(
162                "Failed to dispatch repository event to {}", listener.getClass().getCanonicalName(), e);
163    }
164}