001 /*
002 * Copyright 2008-2015 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.core;
017
018 import griffon.core.ApplicationBootstrapper;
019 import griffon.core.GriffonApplication;
020 import griffon.core.artifact.GriffonService;
021 import griffon.core.env.GriffonEnvironment;
022 import griffon.core.injection.Binding;
023 import griffon.core.injection.Injector;
024 import griffon.core.injection.InjectorFactory;
025 import griffon.core.injection.Module;
026 import griffon.util.GriffonClassUtils;
027 import griffon.util.ServiceLoaderUtils;
028 import org.codehaus.griffon.runtime.core.injection.AbstractModule;
029 import org.slf4j.Logger;
030 import org.slf4j.LoggerFactory;
031
032 import javax.annotation.Nonnull;
033 import java.util.ArrayList;
034 import java.util.Collection;
035 import java.util.Iterator;
036 import java.util.LinkedHashMap;
037 import java.util.List;
038 import java.util.Map;
039 import java.util.ServiceLoader;
040
041 import static griffon.core.GriffonExceptionHandler.sanitize;
042 import static griffon.util.AnnotationUtils.sortByDependencies;
043 import static griffon.util.ServiceLoaderUtils.load;
044 import static java.util.Collections.unmodifiableCollection;
045 import static java.util.Objects.requireNonNull;
046
047 /**
048 * @author Andres Almiray
049 * @since 2.0.0
050 */
051 public abstract class AbstractApplicationBootstrapper implements ApplicationBootstrapper {
052 private static final Logger LOG = LoggerFactory.getLogger(DefaultApplicationBootstrapper.class);
053 private static final String INJECTOR = "injector";
054 private static final String GRIFFON_PATH = "META-INF/griffon";
055 private static final String PROPERTIES = ".properties";
056 protected final GriffonApplication application;
057
058 public AbstractApplicationBootstrapper(@Nonnull GriffonApplication application) {
059 this.application = requireNonNull(application, "Argument 'application' must not be null");
060 }
061
062 @Override
063 public void bootstrap() throws Exception {
064 // 1 initialize environment settings
065 LOG.info("Griffon {}", GriffonEnvironment.getGriffonVersion());
066 LOG.info("Build: {}", GriffonEnvironment.getBuildDateTime());
067 LOG.info("JVM: {}", GriffonEnvironment.getJvmVersion());
068 LOG.info("OS: {}", GriffonEnvironment.getOsVersion());
069
070 // 2 create bindings
071 LOG.debug("Creating module bindings");
072 Iterable<Binding<?>> bindings = createBindings();
073
074 if (LOG.isTraceEnabled()) {
075 for (Binding<?> binding : bindings) {
076 LOG.trace(binding.toString());
077 }
078 }
079
080 // 3 create injector
081 LOG.debug("Creating application injector");
082 createInjector(bindings);
083 }
084
085 @Override
086 public void run() {
087 application.initialize();
088 application.startup();
089 application.ready();
090 }
091
092 @Nonnull
093 protected Iterable<Binding<?>> createBindings() {
094 Map<Key, Binding<?>> map = new LinkedHashMap<>();
095
096 List<Module> modules = new ArrayList<>();
097 createApplicationModule(modules);
098 createArtifactsModule(modules);
099 collectModuleBindings(modules);
100
101 for (Module module : modules) {
102 for (Binding<?> binding : module.getBindings()) {
103 map.put(Key.of(binding), binding);
104 }
105 }
106
107 return unmodifiableCollection(map.values());
108 }
109
110 protected void createArtifactsModule(@Nonnull List<Module> modules) {
111 final List<Class<?>> classes = new ArrayList<>();
112 load(getClass().getClassLoader(), GRIFFON_PATH, new ServiceLoaderUtils.PathFilter() {
113 @Override
114 public boolean accept(@Nonnull String path) {
115 return !path.endsWith(PROPERTIES);
116 }
117 }, new ServiceLoaderUtils.ResourceProcessor() {
118 @Override
119 public void process(@Nonnull ClassLoader classLoader, @Nonnull String line) {
120 line = line.trim();
121 try {
122 classes.add(classLoader.loadClass(line));
123 } catch (ClassNotFoundException e) {
124 LOG.warn("'" + line + "' could not be resolved as a Class");
125 }
126 }
127 });
128
129 modules.add(new AbstractModule() {
130 @Override
131 protected void doConfigure() {
132 for (Class<?> clazz : classes) {
133 if (GriffonService.class.isAssignableFrom(clazz)) {
134 bind(clazz).asSingleton();
135 } else {
136 bind(clazz);
137 }
138 }
139 }
140 });
141 }
142
143 protected void createApplicationModule(@Nonnull List<Module> modules) {
144 modules.add(new AbstractModule() {
145 @Override
146 protected void doConfigure() {
147 bind(GriffonApplication.class)
148 .toInstance(application);
149 }
150 });
151 }
152
153 protected void collectModuleBindings(@Nonnull Collection<Module> modules) {
154 List<Module> moduleInstances = loadModules();
155 moduleInstances.add(0, new DefaultApplicationModule());
156 Map<String, Module> sortedModules = sortModules(moduleInstances);
157 for (Map.Entry<String, Module> entry : sortedModules.entrySet()) {
158 LOG.debug("Loading module bindings from {}:{}", entry.getKey(), entry.getValue());
159 modules.add(entry.getValue());
160 }
161 }
162
163 @Nonnull
164 protected Map<String, Module> sortModules(@Nonnull List<Module> moduleInstances) {
165 return sortByDependencies(moduleInstances, "Module", "module");
166 }
167
168 @Nonnull
169 protected abstract List<Module> loadModules();
170
171 private void createInjector(@Nonnull Iterable<Binding<?>> bindings) throws Exception {
172 ServiceLoader<InjectorFactory> serviceLoader = ServiceLoader.load(InjectorFactory.class);
173 try {
174 Iterator<InjectorFactory> iterator = serviceLoader.iterator();
175 InjectorFactory injectorFactory = iterator.next();
176 LOG.debug("Injector will be created by {}", injectorFactory);
177 Injector<?> injector = injectorFactory.createInjector(application, bindings);
178 GriffonClassUtils.setProperty(application, INJECTOR, injector);
179 } catch (Exception e) {
180 LOG.error("An error occurred while initializing the injector", sanitize(e));
181 throw e;
182 }
183 }
184 }
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