| /** |
| * 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.storm.command; |
| |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.storm.Config; |
| import org.apache.storm.utils.DRPCClient; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A simple client for connecting to DRPC. |
| */ |
| public class BasicDrpcClient { |
| private static final Logger LOG = LoggerFactory.getLogger(BasicDrpcClient.class); |
| |
| private static void runAndPrint(DRPCClient drpc, String func, String arg) throws Exception { |
| String result = drpc.execute(func, arg); |
| System.out.println(String.format("%s \"%s\" => \"%s\"", func, arg, result)); |
| } |
| |
| /** |
| * Main entry point for the basic DRPC client. |
| * @param args command line arguments to be parsed |
| * @throws Exception on errors |
| */ |
| public static void main(String[] args) throws Exception { |
| Map<String, Object> cl = CLI.opt("f", "function", null, CLI.AS_STRING) |
| .arg("FUNC_AND_ARGS", CLI.INTO_LIST) |
| .parse(args); |
| final List<String> funcAndArgs = (List<String>) cl.get("FUNC_AND_ARGS"); |
| final String function = (String) cl.get("f"); |
| Config conf = new Config(); |
| try (DRPCClient drpc = DRPCClient.getConfiguredClient(conf)) { |
| if (function == null) { |
| if (funcAndArgs.size() % 2 != 0) { |
| LOG.error("If no -f is supplied arguments need to be in the form [function arg]. This has {} args", funcAndArgs.size()); |
| System.exit(-1); |
| } |
| for (int i = 0; i < funcAndArgs.size(); i += 2) { |
| String func = funcAndArgs.get(i); |
| String arg = funcAndArgs.get(i + 1); |
| runAndPrint(drpc, func, arg); |
| } |
| } else { |
| for (String arg : funcAndArgs) { |
| runAndPrint(drpc, function, arg); |
| } |
| } |
| } |
| } |
| } |