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package org.apache.turbine.services.assemblerbroker; |
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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 java.util.Vector; |
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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.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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53 | 58 | public class TurbineAssemblerBrokerService |
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extends TurbineBaseService |
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implements AssemblerBrokerService |
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{ |
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58 | 58 | private static Log log |
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= LogFactory.getLog(TurbineAssemblerBrokerService.class); |
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62 | 58 | private Map<String, List<AssemblerFactory>> factories = null; |
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65 | 58 | private Map<String, Assembler> assemblerCache = null; |
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68 | 58 | private Map<String, Loader> loaderCache = null; |
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private boolean isCaching; |
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private List<AssemblerFactory> getFactoryGroup(String type) |
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{ |
81 | 1672 | if (!factories.containsKey(type)) |
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{ |
83 | 564 | factories.put(type, new Vector<AssemblerFactory>()); |
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} |
85 | 1672 | return 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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{ |
97 | 564 | List names = getConfiguration().getList(type); |
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99 | 564 | log.info("Registering " + names.size() + " " + type + " factories."); |
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101 | 564 | for (Iterator it = names.iterator(); it.hasNext(); ) |
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{ |
103 | 564 | String factory = (String) it.next(); |
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try |
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{ |
106 | 564 | Object o = Class.forName(factory).newInstance(); |
107 | 564 | registerFactory(type, (AssemblerFactory) o); |
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} |
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110 | 0 | catch (ThreadDeath e) |
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{ |
112 | 0 | throw e; |
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} |
114 | 0 | catch (OutOfMemoryError e) |
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{ |
116 | 0 | throw e; |
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} |
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120 | 0 | catch (Throwable t) |
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{ |
122 | 0 | throw new TurbineException("Failed registering " + type |
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+ " factory: " + factory, t); |
124 | 564 | } |
125 | 564 | } |
126 | 564 | } |
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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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{ |
139 | 94 | factories = new HashMap<String, List<AssemblerFactory>>(); |
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try |
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{ |
143 | 94 | Configuration conf = getConfiguration(); |
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145 | 94 | for (Iterator i = conf.getKeys(); i.hasNext();) |
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{ |
147 | 658 | String type = (String)i.next(); |
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149 | 658 | if (!"classname".equalsIgnoreCase(type)) |
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{ |
151 | 564 | registerFactories(type); |
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} |
153 | 658 | } |
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} |
155 | 0 | catch (TurbineException e) |
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{ |
157 | 0 | throw new InitializationException( |
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"AssemblerBrokerService failed to initialize", e); |
159 | 94 | } |
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161 | 94 | isCaching = Turbine.getConfiguration() |
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.getBoolean(TurbineConstants.MODULE_CACHE_KEY, |
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TurbineConstants.MODULE_CACHE_DEFAULT); |
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165 | 94 | if (isCaching) |
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{ |
167 | 34 | 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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171 | 34 | assemblerCache = new LRUMap(cacheSize); |
172 | 34 | loaderCache = new LRUMap(cacheSize); |
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} |
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175 | 94 | setInit(true); |
176 | 94 | } |
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public void registerFactory(String type, AssemblerFactory factory) |
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{ |
186 | 564 | getFactoryGroup(type).add(factory); |
187 | 564 | } |
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public Assembler getAssembler(String type, String name) |
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throws TurbineException |
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{ |
203 | 212 | String key = type + ":" + name; |
204 | 212 | Assembler assembler = null; |
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206 | 212 | if (isCaching && assemblerCache.containsKey(key)) |
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{ |
208 | 0 | assembler = assemblerCache.get(key); |
209 | 0 | log.debug("Found " + key + " in the cache!"); |
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} |
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else |
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{ |
213 | 212 | log.debug("Loading " + key); |
214 | 212 | List<AssemblerFactory> facs = getFactoryGroup(type); |
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216 | 212 | for (Iterator<AssemblerFactory> it = facs.iterator(); (assembler == null) && it.hasNext();) |
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{ |
218 | 212 | AssemblerFactory fac = it.next(); |
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try |
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{ |
222 | 212 | assembler = fac.getAssembler(name); |
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} |
224 | 0 | catch (Exception e) |
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{ |
226 | 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); |
230 | 212 | } |
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232 | 212 | if (isCaching && assembler != null) |
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{ |
234 | 0 | assemblerCache.put(key, assembler); |
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} |
236 | 212 | } |
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} |
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239 | 212 | return assembler; |
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} |
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public Loader getLoader(String type) |
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{ |
250 | 1100 | Loader loader = null; |
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252 | 1100 | if (isCaching && loaderCache.containsKey(type)) |
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{ |
254 | 204 | loader = loaderCache.get(type); |
255 | 204 | log.debug("Found " + type + " loader in the cache!"); |
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} |
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else |
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{ |
259 | 896 | log.debug("Getting Loader for " + type); |
260 | 896 | List facs = getFactoryGroup(type); |
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262 | 896 | for (Iterator it = facs.iterator(); (loader == null) && it.hasNext();) |
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{ |
264 | 896 | AssemblerFactory fac = (AssemblerFactory) it.next(); |
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266 | 896 | loader = fac.getLoader(); |
267 | 896 | } |
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269 | 896 | if (isCaching && loader != null) |
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{ |
271 | 170 | loaderCache.put(type, loader); |
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} |
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} |
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275 | 1100 | if (loader == null) |
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{ |
277 | 0 | log.warn("Loader for " + type + " is null."); |
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} |
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280 | 1100 | return loader; |
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} |
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} |