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/*
* Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
*
* 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.traccar;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.helper.NetworkUtil;
import org.traccar.model.Command;
public abstract class BaseProtocolEncoder extends ChannelOutboundHandlerAdapter {
private static final Logger LOGGER = LoggerFactory.getLogger(BaseProtocolEncoder.class);
private static final String PROTOCOL_UNKNOWN = "unknown";
private final Protocol protocol;
public BaseProtocolEncoder(Protocol protocol) {
this.protocol = protocol;
}
public String getProtocolName() {
return protocol != null ? protocol.getName() : PROTOCOL_UNKNOWN;
}
protected String getUniqueId(long deviceId) {
return Context.getIdentityManager().getById(deviceId).getUniqueId();
}
protected void initDevicePassword(Command command, String defaultPassword) {
if (!command.getAttributes().containsKey(Command.KEY_DEVICE_PASSWORD)) {
String password = Context.getIdentityManager()
.getDevicePassword(command.getDeviceId(), getProtocolName(), defaultPassword);
command.set(Command.KEY_DEVICE_PASSWORD, password);
}
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
NetworkMessage networkMessage = (NetworkMessage) msg;
if (networkMessage.getMessage() instanceof Command) {
Command command = (Command) networkMessage.getMessage();
Object encodedCommand = encodeCommand(ctx.channel(), command);
StringBuilder s = new StringBuilder();
s.append("[").append(NetworkUtil.session(ctx.channel())).append("] ");
s.append("id: ").append(getUniqueId(command.getDeviceId())).append(", ");
s.append("command type: ").append(command.getType()).append(" ");
if (encodedCommand != null) {
s.append("sent");
} else {
s.append("not sent");
}
LOGGER.info(s.toString());
ctx.write(new NetworkMessage(encodedCommand, networkMessage.getRemoteAddress()), promise);
} else {
super.write(ctx, msg, promise);
}
}
protected Object encodeCommand(Channel channel, Command command) {
return encodeCommand(command);
}
protected Object encodeCommand(Command command) {
return null;
}
}
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