| /* |
| * 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 org.apache.cocoon.components.flow.java; |
| |
| import org.apache.avalon.framework.CascadingRuntimeException; |
| import org.apache.avalon.framework.logger.Logger; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.components.ContextHelper; |
| import org.apache.cocoon.components.flow.FlowHelper; |
| import org.apache.cocoon.components.flow.util.PipelineUtil; |
| import org.apache.cocoon.environment.Request; |
| import org.apache.excalibur.source.SourceUtil; |
| |
| import java.io.OutputStream; |
| import java.util.Map; |
| |
| /** |
| * Abstract class to add basic methods for flow handling. |
| * |
| * @author <a href="mailto:tcurdt@apache.org">Torsten Curdt</a> |
| * @author <a href="mailto:stephan@apache.org">Stephan Michels</a> |
| * @version CVS $Id$ |
| */ |
| public abstract class AbstractContinuable implements Continuable { |
| |
| protected ContinuationContext getContext() { |
| Continuation currentContinuation = Continuation.currentContinuation(); |
| if (currentContinuation == null) { |
| throw new IllegalStateException("No continuation is running"); |
| } |
| return (ContinuationContext) currentContinuation.getContext(); |
| } |
| |
| public Logger getLogger() { |
| return getContext().getLogger(); |
| } |
| |
| public void sendPageAndWait(String uri) { |
| sendPageAndWait(uri, new VarMap()); |
| } |
| |
| public void sendPageAndWait(String uri, Object bizdata) { |
| |
| ContinuationContext context = getContext(); |
| |
| if (context.getLogger()!=null) |
| context.getLogger().debug("send page and wait '" + uri + "'"); |
| |
| FlowHelper.setContextObject(ContextHelper.getObjectModel(context.getAvalonContext()), bizdata); |
| |
| if (SourceUtil.indexOfSchemeColon(uri) == -1) { |
| uri = "cocoon:/" + uri; |
| if (context.getRedirector().hasRedirected()) { |
| throw new IllegalStateException("Pipeline has already been processed for this request"); |
| } |
| try { |
| context.getRedirector().redirect(false, uri); |
| } catch (Exception e) { |
| throw new CascadingRuntimeException("Cannot redirect to '"+uri+"'", e); |
| } |
| } else { |
| throw new IllegalArgumentException("uri is not allowed to contain a scheme (cocoon:/ is always automatically used)"); |
| } |
| |
| Continuation.suspend(); |
| } |
| |
| public void sendPage(String uri) { |
| sendPage(uri, new VarMap()); |
| } |
| |
| public void sendPage(String uri, Object bizdata) { |
| |
| ContinuationContext context = getContext(); |
| |
| if (context.getLogger()!=null) |
| context.getLogger().debug("send page '" + uri + "'"); |
| |
| FlowHelper.setContextObject(ContextHelper.getObjectModel(context.getAvalonContext()), bizdata); |
| |
| if (SourceUtil.indexOfSchemeColon(uri) == -1) { |
| uri = "cocoon:/" + uri; |
| if (context.getRedirector().hasRedirected()) { |
| throw new IllegalStateException("Pipeline has already been processed for this request"); |
| } |
| try { |
| context.getRedirector().redirect(false, uri); |
| } catch (Exception e) { |
| throw new CascadingRuntimeException("Cannot redirect to '"+uri+"'", e); |
| } |
| } else { |
| throw new IllegalArgumentException("uri is not allowed to contain a scheme (cocoon:/ is always automatically used)"); |
| } |
| } |
| |
| public Request getRequest() { |
| return ContextHelper.getRequest(getContext().getAvalonContext()); |
| } |
| |
| public Map getObjectModel() { |
| return ContextHelper.getObjectModel(getContext().getAvalonContext()); |
| } |
| |
| public Parameters getParameters() { |
| return getContext().getParameters(); |
| } |
| |
| public void processPipelineTo(String uri, Object bizdata, OutputStream out) { |
| |
| ContinuationContext context = getContext(); |
| |
| PipelineUtil pipeUtil = new PipelineUtil(); |
| try { |
| pipeUtil.contextualize(context.getAvalonContext()); |
| pipeUtil.service(context.getServiceManager()); |
| pipeUtil.processToStream(uri, bizdata, out); |
| } catch (Exception e) { |
| throw new CascadingRuntimeException("Cannot process pipeline to '"+uri+"'", e); |
| } finally { |
| pipeUtil.dispose(); |
| } |
| } |
| |
| public void redirectTo(String uri) { |
| try { |
| getContext().getRedirector().redirect(false, uri); |
| } catch (Exception e) { |
| throw new CascadingRuntimeException("Cannot redirect to '"+uri+"'", e); |
| } |
| } |
| |
| public void sendStatus(int sc) { |
| getContext().getRedirector().sendStatus(sc); |
| } |
| |
| /** |
| * Access components. |
| */ |
| public Object getComponent(String id) { |
| try { |
| return getContext().getServiceManager().lookup(id); |
| } catch (Exception e) { |
| throw new CascadingRuntimeException("Cannot lookup component '"+id+"'", e); |
| } |
| } |
| |
| /** |
| * Release pooled components. |
| * |
| * @param component a component |
| */ |
| public void releaseComponent( Object component ) { |
| if (component != null) { |
| getContext().getServiceManager().release(component); |
| } |
| } |
| } |