com.c9.dashboard.DashboardModule.java Source code

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Here is the source code for com.c9.dashboard.DashboardModule.java

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/*
 * Copyright 2013 Red Hat, Inc.
 *
 * Red Hat 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.c9.dashboard;

import org.vertx.java.busmods.BusModBase;
import org.vertx.java.core.Handler;
import org.vertx.java.core.buffer.Buffer;
import org.vertx.java.core.eventbus.Message;
import org.vertx.java.core.http.HttpClient;
import org.vertx.java.core.http.HttpClientRequest;
import org.vertx.java.core.http.HttpClientResponse;
import org.vertx.java.core.json.JsonObject;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.StringUtils;

public class DashboardModule extends BusModBase {
    Handler<Message<JsonObject>> apiHandler;

    private String baseUrl;
    private String username;
    private String password;
    private String apiVersion;
    private String encodedUserPwd;

    private HttpClient client;

    public void start() {
        super.start();

        baseUrl = getOptionalStringConfig("klipfolioBaseUrl", null);

        username = getOptionalStringConfig("username", null);

        password = getOptionalStringConfig("password", null);

        apiVersion = getOptionalStringConfig("apiVersion", "/api/1/");

        if (baseUrl == null || username == null || password == null) {
            throw new RuntimeException("Mandatory Fields were not set!");
        }

        encodedUserPwd = Base64.encodeBase64String(StringUtils.getBytesUtf8(username + ":" + password));

        client = vertx.createHttpClient().setHost(baseUrl).setSSL(true).setPort(443).setMaxPoolSize(10);

        apiHandler = new Handler<Message<JsonObject>>() {
            @Override
            public void handle(Message<JsonObject> event) {
                logger.debug("Recieved Event : " + event.body());
                String action = getMandatoryString("action", event);

                try {
                    if ("get".equalsIgnoreCase(action)) {
                        doGet(event);
                    } else if ("add".equalsIgnoreCase(action)) {
                        // Call the getAPI and reply
                        doPost(event);
                    } else if ("update".equalsIgnoreCase(action)) {
                        doPut(event);
                    } else if ("delete".equalsIgnoreCase(action)) {
                        doDelete(event);
                    }
                } catch (Exception e) {
                    sendError(event, e.getMessage(), e);
                }

            }
        };

        vertx.eventBus().registerHandler("klipfolio.api", apiHandler);
    }

    protected void doDelete(Message<JsonObject> event) {
        String resource = getMandatoryString("resource", event);

        HttpClientRequest request = client.delete(apiVersion + resource, handle(event));

        request.putHeader("Authorization", "Basic " + encodedUserPwd);

        request.putHeader("Content-Type", "application/json");

        request.exceptionHandler(handleException(event));

        request.end();
    }

    protected void doPut(Message<JsonObject> event) {
        String resource = getMandatoryString("resource", event);

        JsonObject jsonObject = getMandatoryObject("data", event);

        HttpClientRequest request = client.put(apiVersion + resource, handle(event));

        request.write(new Buffer(jsonObject.toString()));

        request.putHeader("Authorization", "Basic " + encodedUserPwd);

        request.putHeader("Content-Type", "application/json");

        request.exceptionHandler(handleException(event));

        request.end();

    }

    protected void doPost(Message<JsonObject> event) {
        String resource = getMandatoryString("resource", event);

        JsonObject jsonObject = getMandatoryObject("data", event);

        HttpClientRequest request = client.post(apiVersion + resource, handle(event));

        request.write(new Buffer(jsonObject.toString()));

        request.putHeader("Authorization", "Basic " + encodedUserPwd);

        request.putHeader("Content-Type", "application/json");

        request.exceptionHandler(handleException(event));

        request.end();
    }

    protected void doGet(final Message<JsonObject> event) {
        String resource = getMandatoryString("resource", event);

        HttpClientRequest request = client.get(apiVersion + resource, handle(event));

        request.putHeader("Authorization", "Basic " + encodedUserPwd);

        request.exceptionHandler(handleException(event));

        request.end();
    }

    private Handler<Throwable> handleException(final Message<JsonObject> event) {
        return new Handler<Throwable>() {
            @Override
            public void handle(Throwable e) {
                e.printStackTrace();
                logger.debug("Error in request to Klipfolio.", e);
                sendError(event, "Exception in request.", new Exception(e));
            }
        };
    }

    private Handler<HttpClientResponse> handle(final Message<JsonObject> event) {
        return new Handler<HttpClientResponse>() {
            @Override
            public void handle(HttpClientResponse response) {

                response.exceptionHandler(handleException(event));

                if (response.statusCode() != 200) {
                    logger.debug("Request to Klipfolio did not return with http code 200");
                    sendError(event, "Http Status returned : " + response.statusCode() + " Message : "
                            + response.statusMessage());
                    return;
                }

                // Handle json response
                response.bodyHandler(new Handler<Buffer>() {
                    @Override
                    public void handle(Buffer buffer) {
                        logger.debug("Recieved Response : " + buffer.toString());
                        event.reply(new JsonObject(buffer.toString()));
                    }
                });
            }
        };
    }
}