/*
* JBoss, Home of Professional Open Source
* Copyright 2012 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
*/
package org.jboss.elasticsearch.river.jira.mgm;
import java.io.IOException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestStatus;
/**
* Base action listener used for Jira River management action calls. Handles response in case if jira river is not
* found, or if there is some error.
*
* @author Vlastimil Elias (velias at redhat dot com)
*/
public abstract class JRMgmBaseActionListener<Request extends JRMgmBaseRequest<?>, Response extends JRMgmBaseResponse<NodeResponse>, NodeResponse extends NodeJRMgmBaseResponse>
implements ActionListener<Response> {
protected final ESLogger logger;
protected final RestRequest restRequest;
protected final RestChannel restChannel;
protected final Request actionRequest;
/**
* Create new action listener.
*
* @param actionRequest this listener process result for
* @param restRequest we handle
* @param restChannel to write rest response into
*/
public JRMgmBaseActionListener(Request actionRequest, RestRequest restRequest, RestChannel restChannel) {
super();
this.restRequest = restRequest;
this.restChannel = restChannel;
this.actionRequest = actionRequest;
logger = Loggers.getLogger(getClass());
}
@Override
public void onResponse(Response response) {
try {
NodeResponse nodeInfo = response.getSuccessNodeResponse();
if (nodeInfo == null) {
restChannel.sendResponse(new BytesRestResponse(RestStatus.NOT_FOUND, buildMessageDocument(restRequest,
"No JiraRiver found for name: " + actionRequest.getRiverName())));
} else {
handleJiraRiverResponse(nodeInfo);
}
} catch (Exception e) {
onFailure(e);
}
}
/**
* Implement this in subclasses to handle response from jira river and return REST response based on it.
*
* @param nodeInfo operation response from node with jira river, never null
* @throws Exception if something is wrong
*/
protected abstract void handleJiraRiverResponse(NodeResponse nodeInfo) throws Exception;
@Override
public void onFailure(Throwable e) {
try {
restChannel.sendResponse(new BytesRestResponse(restChannel, e));
} catch (IOException e1) {
logger.error("Failed to send failure response", e1);
}
}
/**
* Build response document with only one field called <code>message</code>. You can use this in
* {@link #handleJiraRiverResponse(NodeJRMgmBaseResponse)} implementation if you only need to return simple message.
*
* @param restRequest to build response document for
* @param message to be placed in document
* @return document with message
* @throws IOException
*/
public static XContentBuilder buildMessageDocument(RestRequest restRequest, String message) throws IOException {
XContentBuilder builder = RestXContentBuilder.restContentBuilder(restRequest);
builder.startObject();
builder.field("message", message);
builder.endObject();
return builder;
}
}