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package org.apache.tapestry.services.impl; |
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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.hivemind.ApplicationRuntimeException; |
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import org.apache.hivemind.ErrorLog; |
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import org.apache.tapestry.engine.IEngineService; |
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import org.apache.tapestry.services.ServiceMap; |
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public class ServiceMapImpl implements ServiceMap, EngineServiceSource |
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{ |
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private List _applicationServices; |
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private List _factoryServices; |
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private ErrorLog _errorLog; |
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private Map _services; |
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private Map _proxies = new HashMap(); |
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public void initializeService() |
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{ |
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Map factoryMap = buildServiceMap(_factoryServices); |
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Map applicationMap = buildServiceMap(_applicationServices); |
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factoryMap.putAll(applicationMap); |
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_services = factoryMap; |
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} |
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private Map buildServiceMap(List services) |
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{ |
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Map result = new HashMap(); |
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Iterator i = services.iterator(); |
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while (i.hasNext()) |
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{ |
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EngineServiceContribution contribution = (EngineServiceContribution) i.next(); |
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String name = contribution.getName(); |
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EngineServiceContribution existing = (EngineServiceContribution) result.get(name); |
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if (existing != null) |
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{ |
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_errorLog.error( |
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ImplMessages.dupeService(name, existing), |
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existing.getLocation(), |
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null); |
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continue; |
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} |
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result.put(name, contribution); |
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} |
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return result; |
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} |
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public synchronized IEngineService getService(String name) |
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{ |
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IEngineService result = (IEngineService) _proxies.get(name); |
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if (result == null) |
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{ |
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result = buildProxy(name); |
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_proxies.put(name, result); |
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} |
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return result; |
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} |
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public boolean isValid(String name) |
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{ |
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return _services.containsKey(name); |
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} |
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public IEngineService resolveEngineService(String name) |
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{ |
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EngineServiceContribution contribution = (EngineServiceContribution) _services.get(name); |
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if (contribution == null) |
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throw new ApplicationRuntimeException(ImplMessages.noSuchService(name)); |
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IEngineService service = contribution.getService(); |
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String serviceName = service.getName(); |
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if (!name.equals(serviceName)) |
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throw new ApplicationRuntimeException(ImplMessages.serviceNameMismatch( |
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service, |
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name, |
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serviceName), contribution.getLocation(), null); |
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return service; |
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} |
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private IEngineService buildProxy(String name) |
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{ |
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if (!_services.containsKey(name)) |
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throw new ApplicationRuntimeException(ImplMessages.noSuchService(name)); |
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EngineServiceOuterProxy outer = new EngineServiceOuterProxy(name); |
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EngineServiceInnerProxy inner = new EngineServiceInnerProxy(name, outer, this); |
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outer.installDelegate(inner); |
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return outer; |
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} |
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public void setApplicationServices(List applicationServices) |
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{ |
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_applicationServices = applicationServices; |
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} |
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public void setFactoryServices(List factoryServices) |
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{ |
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_factoryServices = factoryServices; |
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} |
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public void setErrorLog(ErrorLog errorLog) |
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{ |
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_errorLog = errorLog; |
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} |
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} |