| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package freemarker.debug.impl; |
| |
| import java.rmi.RemoteException; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import freemarker.core.Environment; |
| import freemarker.template.Template; |
| import freemarker.template.utility.SecurityUtilities; |
| |
| /** |
| * This class provides debugging hooks for the core FreeMarker engine. It is |
| * not usable for anyone outside the FreeMarker core classes. It is public only |
| * as an implementation detail. |
| */ |
| public abstract class DebuggerService { |
| private static final DebuggerService instance = createInstance(); |
| |
| private static DebuggerService createInstance() { |
| // Creates the appropriate service class. If the debugging is turned |
| // off, this is a fast no-op service, otherwise it's the real-thing |
| // RMI service. |
| return |
| SecurityUtilities.getSystemProperty("freemarker.debug.password", null) == null |
| ? (DebuggerService) new NoOpDebuggerService() |
| : (DebuggerService) new RmiDebuggerService(); |
| } |
| |
| public static List getBreakpoints(String templateName) { |
| return instance.getBreakpointsSpi(templateName); |
| } |
| |
| abstract List getBreakpointsSpi(String templateName); |
| |
| public static void registerTemplate(Template template) { |
| instance.registerTemplateSpi(template); |
| } |
| |
| abstract void registerTemplateSpi(Template template); |
| |
| public static boolean suspendEnvironment(Environment env, String templateName, int line) |
| throws RemoteException { |
| return instance.suspendEnvironmentSpi(env, templateName, line); |
| } |
| |
| abstract boolean suspendEnvironmentSpi(Environment env, String templateName, int line) |
| throws RemoteException; |
| |
| abstract void shutdownSpi(); |
| |
| public static void shutdown() { |
| instance.shutdownSpi(); |
| } |
| |
| private static class NoOpDebuggerService extends DebuggerService { |
| @Override |
| List getBreakpointsSpi(String templateName) { |
| return Collections.EMPTY_LIST; |
| } |
| |
| @Override |
| boolean suspendEnvironmentSpi(Environment env, String templateName, int line) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| void registerTemplateSpi(Template template) { |
| } |
| |
| @Override |
| void shutdownSpi() { |
| } |
| } |
| } |