com.sequenceiq.ambari.shell.AmbariShell.java Source code

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Here is the source code for com.sequenceiq.ambari.shell.AmbariShell.java

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/**
 * 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 com.sequenceiq.ambari.shell;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.shell.CommandLine;
import org.springframework.shell.core.JLineShellComponent;
import org.springframework.shell.event.ShellStatus;
import org.springframework.shell.event.ShellStatusListener;

import com.sequenceiq.ambari.client.AmbariClient;
import com.sequenceiq.ambari.shell.model.AmbariContext;
import com.sequenceiq.ambari.shell.model.Hints;

/**
 * Shell bootstrap.
 */
@Configuration
@ComponentScan(basePackageClasses = { AmbariShell.class })
public class AmbariShell implements CommandLineRunner, ShellStatusListener {

    @Autowired
    private CommandLine commandLine;
    @Autowired
    private JLineShellComponent shell;
    @Autowired
    private AmbariContext context;
    @Autowired
    private AmbariClient client;

    @Override
    public void run(String... arg) throws Exception {
        String[] shellCommandsToExecute = commandLine.getShellCommandsToExecute();
        if (shellCommandsToExecute != null) {
            for (String cmd : shellCommandsToExecute) {
                if (!shell.executeScriptLine(cmd)) {
                    break;
                }
            }
            System.exit(0);
        } else {
            shell.addShellStatusListener(this);
            shell.start();
            shell.promptLoop();
            shell.waitForComplete();
        }
    }

    @Override
    public void onShellStatusChange(ShellStatus oldStatus, ShellStatus newStatus) {
        if (newStatus.getStatus() == ShellStatus.Status.STARTED) {
            try {
                String cluster = client.getClusterName();
                boolean available = client.isBlueprintAvailable();
                if (cluster == null) {
                    if (available) {
                        context.setHint(Hints.BUILD_CLUSTER);
                    } else {
                        context.setHint(Hints.ADD_BLUEPRINT);
                    }
                } else {
                    context.setHint(Hints.PROGRESS);
                }
                context.setCluster(cluster);
                context.setBlueprintsAvailable(available);
            } catch (Exception e) {
                System.out.println(e.getMessage());
                shell.executeCommand("quit");
            }
        }
    }

    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println("\nAmbari Shell: Interactive command line tool for managing Apache Ambari.\n\n"
                    + "Usage:\n"
                    + "  java -jar ambari-shell.jar                  : Starts Ambari Shell in interactive mode.\n"
                    + "  java -jar ambari-shell.jar --cmdfile=<FILE> : Ambari Shell executes commands read from the file.\n\n"
                    + "Options:\n"
                    + "  --ambari.host=<HOSTNAME>       Hostname of the Ambari Server [default: localhost].\n"
                    + "  --ambari.port=<PORT>           Port of the Ambari Server [default: 8080].\n"
                    + "  --ambari.user=<USER>           Username of the Ambari admin [default: admin].\n"
                    + "  --ambari.password=<PASSWORD>   Password of the Ambari admin [default: admin].\n\n"
                    + "Note:\n" + "  At least one option is mandatory.");
            System.exit(1);
        }
        new SpringApplicationBuilder(AmbariShell.class).showBanner(false).run(args);
    }
}