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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.host.webapp.jsp;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.tuscany.sca.host.embedded.SCADomain;
import org.apache.tuscany.sca.host.webapp.WebAppServletHost;
import org.osoa.sca.ComponentContext;
/**
* Tag to handle SCA references
* <sca:reference name="service" type="test.MyService" scope="1" />
*
* @version $Rev$ $Date$
*/
public class ReferenceTag extends TagSupport {
private static final long serialVersionUID = 1L;
protected String name;
protected String type;
protected Integer scope = PageContext.PAGE_SCOPE;
@Override
public int doStartTag() throws JspException {
return SKIP_BODY;
}
@Override
public int doEndTag() throws JspException {
try {
WebAppServletHost.getInstance().init(pageContext.getServletConfig());
} catch (ServletException e) {
throw new JspException("Exception initializing Tuscany webapp: " + e, e);
}
ServletContext servletContext = pageContext.getServletContext();
ComponentContext componentContext = (ComponentContext)servletContext.getAttribute("org.osoa.sca.ComponentContext");
SCADomain scaDomain = null;
if (componentContext == null) {
scaDomain = (SCADomain)servletContext.getAttribute(WebAppServletHost.SCA_DOMAIN_ATTRIBUTE);
if (scaDomain == null) {
throw new JspException("SCADomain is null. Check Tuscany configuration in web.xml");
}
}
Class<?> typeClass;
try {
typeClass = Class.forName(type, true, Thread.currentThread().getContextClassLoader());
} catch (ClassNotFoundException e) {
throw new JspException("Reference '" + name + "' type class not found: " + type);
}
Object o;
try {
if (componentContext != null) {
o = componentContext.getService(typeClass, name);
} else {
o = scaDomain.getService(typeClass, name);
}
} catch (Exception e) {
throw new JspException("Exception getting service for reference'" + name + "': " + e, e);
}
if (o == null) {
throw new JspException("Reference '" + name + "' not found");
}
pageContext.setAttribute(name, o, scope);
return EVAL_PAGE;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getScope() {
return scope;
}
public void setScope(Integer scope) {
this.scope = scope;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
}
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