001/* 002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others. 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 * Contributors: 017 * dragos 018 * 019 * $Id$ 020 */ 021package org.nuxeo.ecm.platform.rendering.impl; 022 023import java.util.ArrayList; 024import java.util.Collection; 025import java.util.List; 026import java.util.concurrent.ConcurrentHashMap; 027 028import org.apache.commons.logging.Log; 029import org.apache.commons.logging.LogFactory; 030import org.nuxeo.ecm.platform.rendering.RenderingContext; 031import org.nuxeo.ecm.platform.rendering.RenderingEngine; 032import org.nuxeo.ecm.platform.rendering.RenderingException; 033import org.nuxeo.ecm.platform.rendering.RenderingResult; 034import org.nuxeo.ecm.platform.rendering.RenderingService; 035import org.nuxeo.runtime.model.ComponentInstance; 036import org.nuxeo.runtime.model.DefaultComponent; 037 038/** 039 * Implementation of RenderingService 040 * 041 * @author <a href="mailto:dm@nuxeo.com">Dragos Mihalache</a> 042 */ 043public class RenderingServiceImpl extends DefaultComponent implements RenderingService { 044 045 private static final Log log = LogFactory.getLog(RenderingServiceImpl.class); 046 047 public static final String EP_RENDER_ENGINES = "engines"; 048 049 private final ConcurrentHashMap<String, RenderingEngine> engines = new ConcurrentHashMap<>(); 050 051 @Override 052 public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 053 054 if (log.isDebugEnabled()) { 055 log.debug("register: " + contribution + ", ep: " + extensionPoint); 056 } 057 058 if (extensionPoint.equals(EP_RENDER_ENGINES)) { 059 RenderingEngineDescriptor desc = (RenderingEngineDescriptor) contribution; 060 061 try { 062 RenderingEngine engine = desc.newInstance(); 063 engines.put(desc.getFormat(), engine); 064 } catch (ReflectiveOperationException e) { 065 log.error("Cannot register rendering engine for " + desc.getFormat(), e); 066 } 067 } 068 } 069 070 @Override 071 public void unregisterContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 072 if (extensionPoint.equals(EP_RENDER_ENGINES)) { 073 RenderingEngineDescriptor desc = (RenderingEngineDescriptor) contribution; 074 engines.remove(desc.getFormat()); 075 } 076 } 077 078 @Override 079 public RenderingEngine getEngine(String name) { 080 return engines.get(name); 081 } 082 083 @Override 084 public Collection<RenderingResult> process(RenderingContext renderingCtx) throws RenderingException { 085 List<RenderingResult> ret = new ArrayList<>(); 086 087 for (RenderingEngine engine : engines.values()) { 088 if (renderingCtx.accept(engine)) { 089 RenderingResult result = engine.process(renderingCtx); 090 if (result != null) { 091 ret.add(result); 092 } else if (log.isDebugEnabled()) { 093 log.debug("rendering ignored by the engine " + engine.getFormatName()); 094 } 095 } 096 } 097 return ret; 098 } 099 100 @Override 101 public void registerEngine(RenderingEngine engine) { 102 RenderingEngine existing = engines.put(engine.getFormatName(), engine); 103 if (existing != null) { 104 log.debug("Replaced existing RenderingEngine " + engine.getFormatName()); 105 } else if (log.isDebugEnabled()) { 106 log.debug("Registered RenderingEngine " + engine.getFormatName()); 107 } 108 } 109 110 @Override 111 public void unregisterEngine(String name) { 112 engines.remove(name); 113 } 114 115}