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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
ShowEngine.java | 0% | 0% | 0% | 0% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.contrib.inspector;
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import java.io.ByteArrayOutputStream;
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import java.io.CharArrayWriter;
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import java.io.IOException;
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import java.io.ObjectOutputStream;
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import java.io.OutputStream;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.tapestry.BaseComponent;
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import org.apache.tapestry.IMarkupWriter;
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import org.apache.tapestry.IRender;
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import org.apache.tapestry.IRequestCycle;
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import org.apache.tapestry.Tapestry;
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import org.apache.tapestry.event.PageDetachListener;
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import org.apache.tapestry.event.PageEvent;
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import org.apache.tapestry.util.io.BinaryDumpOutputStream;
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/**
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* Component of the {@link Inspector} page used to display
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* the properties of the {@link org.apache.tapestry.IEngine} as well as a serialized view of it.
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* Also, the {@link org.apache.tapestry.request.RequestContext} is dumped out.
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*
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*
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* @author Howard Lewis Ship
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*
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**/
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public abstract class ShowEngine extends BaseComponent implements PageDetachListener |
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{ |
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private byte[] serializedEngine; |
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public void pageDetached(PageEvent event) |
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{ |
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serializedEngine = null;
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} |
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/**
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* Workaround for OGNL limitation --- OGNL can't dereference
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* past class instances.
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*
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* @since 2.2
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*
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**/
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public String getEngineClassName()
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{ |
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return getPage().getEngine().getClass().getName();
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} |
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private byte[] getSerializedEngine() |
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{ |
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if (serializedEngine == null) |
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buildSerializedEngine(); |
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return serializedEngine;
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} |
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private void buildSerializedEngine() |
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{ |
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ByteArrayOutputStream bos = null;
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ObjectOutputStream oos = null;
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try
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{ |
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bos = new ByteArrayOutputStream();
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oos = new ObjectOutputStream(bos);
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// Write the application object to the stream.
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oos.writeObject(getPage().getEngine()); |
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// Extract the application as an array of bytes.
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serializedEngine = bos.toByteArray(); |
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} |
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catch (IOException ex)
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{ |
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throw new ApplicationRuntimeException( |
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Tapestry.getMessage("ShowEngine.could-not-serialize"),
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ex); |
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} |
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finally
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{ |
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close(oos); |
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close(bos); |
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} |
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// It would be nice to deserialize the application object now, but in
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// practice, that fails due to class loader problems.
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} |
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private void close(OutputStream stream) |
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{ |
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if (stream == null) |
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return;
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try
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{ |
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stream.close(); |
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} |
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catch (IOException ex)
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{ |
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// Ignore.
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} |
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} |
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public int getEngineByteCount() |
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{ |
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return getSerializedEngine().length;
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} |
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public IRender getEngineDumpDelegate()
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{ |
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return new IRender() |
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{ |
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public void render(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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dumpSerializedEngine(writer); |
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} |
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}; |
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} |
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private void dumpSerializedEngine(IMarkupWriter responseWriter) |
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{ |
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CharArrayWriter writer = null;
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BinaryDumpOutputStream bos = null;
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try
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{ |
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// Because IReponseWriter doesn't implement the
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// java.io.Writer interface, we have to buffer this
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// stuff then pack it in all at once. Kind of a waste!
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writer = new CharArrayWriter();
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bos = new BinaryDumpOutputStream(writer);
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bos.setBytesPerLine(32); |
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bos.write(getSerializedEngine()); |
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bos.close(); |
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responseWriter.print(writer.toString()); |
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} |
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catch (IOException ex)
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{ |
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// Ignore.
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} |
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finally
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{ |
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165 | 0 |
if (bos != null) |
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{ |
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167 | 0 |
try
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{ |
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bos.close(); |
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} |
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catch (IOException ex)
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{ |
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// Ignore.
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} |
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} |
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177 | 0 |
if (writer != null) |
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{ |
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writer.reset(); |
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writer.close(); |
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} |
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} |
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} |
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} |
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