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package org.apache.turbine.services.assemblerbroker; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.apache.commons.collections.map.LRUMap; |
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import org.apache.commons.configuration.Configuration; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.apache.turbine.Turbine; |
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import org.apache.turbine.TurbineConstants; |
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import org.apache.turbine.annotation.AnnotationProcessor; |
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import org.apache.turbine.modules.Assembler; |
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import org.apache.turbine.modules.Loader; |
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import org.apache.turbine.services.InitializationException; |
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import org.apache.turbine.services.TurbineBaseService; |
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import org.apache.turbine.services.assemblerbroker.util.AssemblerFactory; |
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import org.apache.turbine.util.TurbineException; |
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54 | 31 | public class TurbineAssemblerBrokerService |
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extends TurbineBaseService |
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implements AssemblerBrokerService |
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{ |
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59 | 31 | private static Log log |
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= LogFactory.getLog(TurbineAssemblerBrokerService.class); |
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63 | 31 | private Map<Class<?>, List<?>> factories = null; |
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66 | 31 | private Map<String, Assembler> assemblerCache = null; |
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69 | 31 | private Map<Class<?>, Loader<? extends Assembler>> loaderCache = null; |
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private boolean isCaching; |
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@SuppressWarnings("unchecked") |
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private <T extends Assembler> List<AssemblerFactory<T>> getFactoryGroup(Class<T> type) |
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{ |
83 | 785 | if (!factories.containsKey(type)) |
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{ |
85 | 246 | factories.put(type, new ArrayList<AssemblerFactory<T>>()); |
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} |
87 | 785 | return (List<AssemblerFactory<T>>) factories.get(type); |
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} |
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private void registerFactories(String type) |
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throws TurbineException |
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{ |
99 | 246 | List<Object> names = getConfiguration().getList(type); |
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101 | 246 | log.info("Registering " + names.size() + " " + type + " factories."); |
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103 | 246 | for (Iterator<Object> it = names.iterator(); it.hasNext(); ) |
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{ |
105 | 246 | String factory = (String) it.next(); |
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try |
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{ |
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@SuppressWarnings("unchecked") |
109 | 246 | AssemblerFactory<? extends Assembler> af = |
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(AssemblerFactory<? extends Assembler>) Class.forName(factory).newInstance(); |
111 | 246 | registerFactory(af); |
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} |
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114 | 0 | catch (ThreadDeath e) |
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{ |
116 | 0 | throw e; |
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} |
118 | 0 | catch (OutOfMemoryError e) |
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{ |
120 | 0 | throw e; |
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} |
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124 | 0 | catch (Throwable t) |
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{ |
126 | 0 | throw new TurbineException("Failed registering " + type |
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+ " factory: " + factory, t); |
128 | 246 | } |
129 | 246 | } |
130 | 246 | } |
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@SuppressWarnings("unchecked") |
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@Override |
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public void init() |
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throws InitializationException |
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{ |
143 | 42 | factories = new HashMap<Class<?>, List<?>>(); |
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try |
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{ |
147 | 42 | Configuration conf = getConfiguration(); |
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149 | 42 | for (Iterator<String> i = conf.getKeys(); i.hasNext();) |
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{ |
151 | 287 | String type = i.next(); |
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153 | 287 | if (!"classname".equalsIgnoreCase(type)) |
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{ |
155 | 246 | registerFactories(type); |
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} |
157 | 287 | } |
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} |
159 | 0 | catch (TurbineException e) |
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{ |
161 | 0 | throw new InitializationException( |
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"AssemblerBrokerService failed to initialize", e); |
163 | 41 | } |
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165 | 41 | isCaching = Turbine.getConfiguration() |
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.getBoolean(TurbineConstants.MODULE_CACHE_KEY, |
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TurbineConstants.MODULE_CACHE_DEFAULT); |
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169 | 41 | if (isCaching) |
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{ |
171 | 16 | int cacheSize = Turbine.getConfiguration() |
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.getInt(TurbineConstants.MODULE_CACHE_SIZE_KEY, |
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TurbineConstants.MODULE_CACHE_SIZE_DEFAULT); |
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175 | 16 | assemblerCache = new LRUMap(cacheSize); |
176 | 16 | loaderCache = new LRUMap(cacheSize); |
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} |
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179 | 41 | setInit(true); |
180 | 41 | } |
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public <T extends Assembler> void registerFactory(AssemblerFactory<T> factory) |
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{ |
189 | 246 | getFactoryGroup(factory.getManagedClass()).add(factory); |
190 | 246 | } |
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@SuppressWarnings("unchecked") |
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public <T extends Assembler> T getAssembler(Class<T> type, String name) |
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throws TurbineException |
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{ |
207 | 150 | String key = type + ":" + name; |
208 | 150 | T assembler = null; |
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210 | 150 | if (isCaching && assemblerCache.containsKey(key)) |
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{ |
212 | 4 | assembler = (T) assemblerCache.get(key); |
213 | 4 | log.debug("Found " + key + " in the cache!"); |
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} |
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else |
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{ |
217 | 146 | log.debug("Loading " + key); |
218 | 146 | List<AssemblerFactory<T>> facs = getFactoryGroup(type); |
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220 | 146 | for (Iterator<AssemblerFactory<T>> it = facs.iterator(); (assembler == null) && it.hasNext();) |
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{ |
222 | 146 | AssemblerFactory<T> fac = it.next(); |
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try |
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{ |
226 | 146 | assembler = fac.getAssembler(name); |
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} |
228 | 0 | catch (Exception e) |
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{ |
230 | 0 | throw new TurbineException("Failed to load an assembler for " |
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+ name + " from the " |
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+ type + " factory " |
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+ fac.getClass().getName(), e); |
234 | 146 | } |
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236 | 146 | if (assembler != null) |
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{ |
238 | 84 | AnnotationProcessor.process(assembler); |
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240 | 84 | if (isCaching) |
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{ |
242 | 15 | assemblerCache.put(key, assembler); |
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} |
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} |
245 | 146 | } |
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} |
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248 | 150 | return assembler; |
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} |
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@SuppressWarnings("unchecked") |
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public <T extends Assembler> Loader<T> getLoader(Class<T> type) |
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{ |
260 | 489 | Loader<T> loader = null; |
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262 | 489 | if (isCaching && loaderCache.containsKey(type)) |
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{ |
264 | 96 | loader = (Loader<T>) loaderCache.get(type); |
265 | 96 | log.debug("Found " + type + " loader in the cache!"); |
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} |
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else |
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{ |
269 | 393 | log.debug("Getting Loader for " + type); |
270 | 393 | List<AssemblerFactory<T>> facs = getFactoryGroup(type); |
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272 | 393 | for (Iterator<AssemblerFactory<T>> it = facs.iterator(); (loader == null) && it.hasNext();) |
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{ |
274 | 393 | AssemblerFactory<T> fac = it.next(); |
275 | 393 | loader = fac.getLoader(); |
276 | 393 | } |
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278 | 393 | if (isCaching && loader != null) |
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{ |
280 | 80 | loaderCache.put(type, loader); |
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} |
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} |
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284 | 489 | if (loader == null) |
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{ |
286 | 0 | log.warn("Loader for " + type + " is null."); |
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} |
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289 | 489 | return loader; |
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} |
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} |