net.nikore.gozer.marathon.CallbackServlet.java Source code

Introduction

Here is the source code for net.nikore.gozer.marathon.CallbackServlet.java

Source

/**
 * Copyright (C) 2015 Matt Christiansen (matt@nikore.net)
 *
 * 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 net.nikore.gozer.marathon;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ExecutionException;

import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.inject.Inject;
import com.google.inject.Singleton;

@Singleton
public class CallbackServlet extends HttpServlet {
    private final ObjectMapper mapper;
    private final MarathonAppCache appCache;

    @Inject
    public CallbackServlet(ObjectMapper mapper, MarathonAppCache appCache) {
        this.mapper = mapper;
        this.appCache = appCache;
    }

    @Override
    public void service(ServletRequest servletRequest, ServletResponse servletResponse)
            throws ServletException, IOException {
        Map<String, Object> eventResponse = mapper.readValue(servletRequest.getInputStream(),
                new TypeReference<Map<String, Object>>() {
                });

        switch ((String) eventResponse.get("eventType")) {
        case "status_update_event":
            String taskStatus = (String) eventResponse.get("taskStatus");
            if (!taskStatus.equals("TASK_STAGING") || !taskStatus.equals("TASK_STARTING")) {
                appCache.refreshClient((String) eventResponse.get("appId"));
            }
            break;
        case "api_post_event":
            Map<String, String> appDef = (Map<String, String>) eventResponse.get("appDefinition");
            try {
                appCache.removeClient(appDef.get("id"));
                appCache.getClient(appDef.get("id"));
            } catch (ExecutionException e) {
                throw new ServletException(e);
            }
            break;
        case "app_terminated_event":
            appCache.removeClient((String) eventResponse.get("appId"));
            break;
        default:
            break;
        //
        }

    }
}