RpcMonitorFilter——monitor dubbo by filter

Overview

基于dubbo的filter机制，实现的对Rpc调用的consumer端、provider端监控

code

package com.qunar.flight.pangolin.pay.filter;

import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.rpc.Filter;
import com.alibaba.dubbo.rpc.Invocation;
import com.alibaba.dubbo.rpc.Invoker;
import com.alibaba.dubbo.rpc.Result;
import com.alibaba.dubbo.rpc.RpcContext;
import com.alibaba.dubbo.rpc.RpcException;
import com.qunar.flight.qmonitor.QMonitor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * dubbo相关 aop监控
 * order = Integer.MIN_VALUE，使之最贴近真实逻辑，以免Context资源被释放
 *
 * @author guohang on 16-8-4
 */
@Activate(group = {Constants.CONSUMER, Constants.PROVIDER}, order = Integer.MIN_VALUE)
public class RpcMonitorFilter implements Filter {

    private final Logger logger = LoggerFactory.getLogger(getClass());
    private static final String ERROR_SUFFIX = "_Error";
    private static final String RPC_PREFIX = "Rpc_";
    private static final String PROVIDER_SUFFIX = "_Provider";
    private static final String CONSUMER_SUFFIX = "_Consumer";


    @Override
    public Result invoke(Invoker invoker, Invocation invocation) throws RpcException {
        long start = System.currentTimeMillis();

        RpcContext context = RpcContext.getContext();
        String key = buildMonitorKey(invoker, invocation, context);

        Result result;
        try {
            result = invoker.invoke(invocation);
            QMonitor.recordOne(key, System.currentTimeMillis() - start);
        } catch (Throwable e) {
            throwableAction(e, key, start);
            throw e;
        }
        return result;
    }

    @SuppressWarnings("all")
    private String buildMonitorKey(Invoker invoker, Invocation invocation, RpcContext context) {

        return new StringBuilder(64).append(RPC_PREFIX).append(invoker.getInterface().getSimpleName())
                .append("_").append(invocation.getMethodName())
                .append(context.isProviderSide() ? PROVIDER_SUFFIX : CONSUMER_SUFFIX).toString();
    }

    private void timeoutAction(RpcException exception, String key, long start) {
        final String TIMEOUT_SUFFIX = "_Timeout";

        String realKey;
        if (exception.isTimeout()) {
            realKey = key.concat(TIMEOUT_SUFFIX);
        } else {
            realKey = key.concat(ERROR_SUFFIX);
        }

        logger.error(realKey, exception);
        QMonitor.recordOne(realKey, System.currentTimeMillis() - start);
        throw exception;
    }

    private void throwableAction(Throwable e, String key, long start) {
        if (e instanceof RpcException) {
            timeoutAction((RpcException) e, key, start);
        } else {
            String realKey = key.concat(ERROR_SUFFIX);
            logger.error(realKey, e);
            QMonitor.recordOne(realKey, System.currentTimeMillis() - start);
        }
    }
}