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/*
* 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.tuscany.sca.implementation.web;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.tuscany.sca.assembly.ComponentReference;
/**
* Servlet that handles the GET request for the componentContext.js script
*
* The script is generated by calling ScriptProcessors to output the code
* for the SCA references, properties etc.
*/
public class ComponentContextServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected static final String HEADER = "/** --- Apache Tuscany componentContext.js --- */\n";
protected static final String FOOTER = "/** --- Apache Tuscany componentContext.js EOF --- */\n";
public static final String COMPONENT_CONTEXT_SCRIPT_URI = "org.apache.tuscany.sca.componentContext.js";
@Override
public void doGet(HttpServletRequest req, HttpServletResponse response) throws IOException {
response.setContentType("text/plain;charset=utf-8");
OutputStream out = response.getOutputStream();
doScriptInit(out);
doScriptReferences(out);
out.write(FOOTER.getBytes("UTF-8"));
out.flush();
out.close();
}
/**
* Calls each ContextScriptProcessor once to insert any required initilization code into componentContext.js
*/
protected void doScriptInit(OutputStream out) throws IOException, UnsupportedEncodingException {
out.write(HEADER.getBytes("UTF-8"));
for (ContextScriptProcessor csp : WebSingleton.INSTANCE.getContextScriptProcessors()) {
csp.scriptInit(out);
}
}
/**
* Calls each ContextScriptProcessor for each SCA reference to insert code for the reference into componentContext.js
*/
protected void doScriptReferences(OutputStream out) throws IOException, UnsupportedEncodingException {
out.write("// SCA References\n".getBytes("UTF-8"));
for (ComponentReference cr : WebSingleton.INSTANCE.getRuntimeComponent().getReferences()) {
String ref = "// SCA Reference " + cr.getName() + "\n";
out.write(ref.getBytes("UTF-8"));
for (ContextScriptProcessor csp : WebSingleton.INSTANCE.getContextScriptProcessors()) {
csp.scriptReference(cr, out);
}
}
out.write("\n// SCA References end.\n".getBytes("UTF-8"));
}
/**
* Calls each ContextScriptProcessor for each SCA property to insert code for the property into componentContext.js
*/
protected void doScriptProperties(OutputStream out) throws IOException, UnsupportedEncodingException {
// TODO: support properties
}
}
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