org.pidster.mqtt.shell.config.MqttConsolePromptProvider.java Source code

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Here is the source code for org.pidster.mqtt.shell.config.MqttConsolePromptProvider.java

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/*
 * Copyright 2012 the original author or authors.
 *
 * 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.pidster.mqtt.shell.config;

import org.pidster.mqtt.shell.event.ConnectionEvent;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationListener;
import org.springframework.shell.plugin.PromptProvider;
import org.springframework.util.StringUtils;

/**
 * @author pidster
 *
 */
public class MqttConsolePromptProvider implements PromptProvider, ApplicationListener<ConnectionEvent> {

    @Value("${mqtt.console.prompt}")
    private String prompt;

    private transient boolean connected = false;

    private transient String hostname;

    private transient String username = "anonymous";

    public String name() {
        return "mqttConsolePromptProvider";
    }

    public String getPrompt() {
        if (connected) {
            return String.format("%s@%s> ", username, hostname);
        }
        return String.format("%s> ", prompt);
    }

    public void onApplicationEvent(ConnectionEvent event) {
        this.connected = event.isConnected();
        this.hostname = event.getHostname();
        if (StringUtils.hasText(event.getUsername())) {
            this.username = event.getUsername();
        } else {
            this.username = "anonymous";
        }
    }

}