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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed 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.onosproject.ovsdb.controller.impl;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import org.onosproject.ovsdb.controller.OvsdbNodeId;
import org.onosproject.ovsdb.controller.driver.OvsdbProviderService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.base.Strings;
/**
* Channel handler deals with the node connection and dispatches
* ovsdb messages to the appropriate locations.
*/
public final class OvsdbJsonRpcHandler extends ChannelInboundHandlerAdapter {
protected static final Logger log = LoggerFactory
.getLogger(OvsdbJsonRpcHandler.class);
private OvsdbNodeId ovsdbNodeId;
private OvsdbProviderService ovsdbProviderService;
/**
* Constructor from a OvsdbNodeId ovsdbNodeId.
*
* @param ovsdbNodeId the ovsdbNodeId to use
*/
public OvsdbJsonRpcHandler(OvsdbNodeId ovsdbNodeId) {
super();
this.ovsdbNodeId = ovsdbNodeId;
}
/**
* Gets the ovsdbProviderService instance.
*
* @return the instance of the ovsdbProviderService
*/
public OvsdbProviderService getOvsdbProviderService() {
return ovsdbProviderService;
}
/**
* Sets the ovsdbProviderService instance.
*
* @param ovsdbNodeDriver the ovsdbNodeDriver to use
*/
public void setOvsdbProviderService(OvsdbProviderService ovsdbNodeDriver) {
this.ovsdbProviderService = ovsdbNodeDriver;
}
/**
* Gets the OvsdbNodeId instance.
*
* @return the instance of the OvsdbNodeId
*/
public OvsdbNodeId getNodeId() {
return ovsdbNodeId;
}
/**
* Sets the ovsdb node id.
*
* @param ovsdbNodeId the ovsdbNodeId to use
*/
public void setNodeId(OvsdbNodeId ovsdbNodeId) {
this.ovsdbNodeId = ovsdbNodeId;
}
/**
* Processes an JsonNode message received on the channel.
*
* @param jsonNode The OvsdbJsonRpcHandler that received the message
*/
private void processOvsdbMessage(JsonNode jsonNode) {
log.debug("Handle ovsdb message");
if (jsonNode.has("result")) {
log.debug("Handle ovsdb result");
ovsdbProviderService.processResult(jsonNode);
} else if (jsonNode.hasNonNull("method")) {
log.debug("Handle ovsdb request");
if (jsonNode.has("id")
&& !Strings.isNullOrEmpty(jsonNode.get("id").asText())) {
ovsdbProviderService.processRequest(jsonNode);
}
}
return;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg)
throws Exception {
log.debug("Receive message from ovsdb");
if (msg instanceof JsonNode) {
JsonNode jsonNode = (JsonNode) msg;
processOvsdbMessage(jsonNode);
}
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext context, Throwable cause) {
log.error("Exception inside channel handling pipeline.", cause);
context.close();
}
}
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