Java tutorial
/** * Copyright (C) 2016 Apigee Corporation * * 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 com.apigee.edge.config.mavenplugin; import com.apigee.edge.config.rest.RestUtil; import com.apigee.edge.config.utils.ServerProfile; import org.apache.maven.plugins.annotations.LifecyclePhase; import org.apache.maven.plugins.annotations.Mojo; import org.apache.maven.plugins.annotations.Parameter; import org.apache.maven.plugins.annotations.ResolutionScope; import org.apache.maven.plugin.MojoExecutionException; import org.apache.maven.plugin.MojoFailureException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.api.client.util.Key; import com.google.gson.Gson; import com.google.gson.JsonParseException; import java.io.IOException; import java.io.File; import java.util.List; import java.util.ArrayList; import org.apache.commons.io.FileUtils; import com.google.api.client.http.*; import org.json.simple.JSONValue; import org.json.simple.JSONArray; import org.json.simple.JSONObject; import org.json.simple.parser.JSONParser; import org.json.simple.parser.ParseException; /** * Goal to create cache in Apigee EDGE * scope: org * * @author madhan.sadasivam * @goal caches * @phase install */ public class CacheMojo extends GatewayAbstractMojo { static Logger logger = LoggerFactory.getLogger(CacheMojo.class); public static final String ____ATTENTION_MARKER____ = "************************************************************************"; enum OPTIONS { none, create, update, delete, sync } OPTIONS buildOption = OPTIONS.none; private ServerProfile serverProfile; public static class Cache { @Key public String name; } public CacheMojo() { super(); } public void init() throws MojoFailureException { try { logger.info(____ATTENTION_MARKER____); logger.info("Apigee Cache"); logger.info(____ATTENTION_MARKER____); String options = ""; serverProfile = super.getProfile(); options = super.getOptions(); if (options != null) { buildOption = OPTIONS.valueOf(options); } logger.debug("Build option " + buildOption.name()); logger.debug("Base dir " + super.getBaseDirectoryPath()); } catch (IllegalArgumentException e) { throw new RuntimeException("Invalid apigee.option provided"); } catch (RuntimeException e) { throw e; } } protected String getCacheName(String payload) throws MojoFailureException { Gson gson = new Gson(); try { Cache cache = gson.fromJson(payload, Cache.class); return cache.name; } catch (JsonParseException e) { throw new MojoFailureException(e.getMessage()); } } /** * create Cache values */ protected void doUpdate(List<String> caches) throws MojoFailureException { try { List existingCaches = null; if (buildOption != OPTIONS.update && buildOption != OPTIONS.create && buildOption != OPTIONS.delete && buildOption != OPTIONS.sync) { return; } logger.info("Retrieving existing environment caches - " + serverProfile.getEnvironment()); existingCaches = getCache(serverProfile); for (String cache : caches) { String cacheName = getCacheName(cache); if (cacheName == null) { throw new IllegalArgumentException("Cache does not have a name.\n" + cache + "\n"); } if (existingCaches.contains(cacheName)) { switch (buildOption) { case update: logger.info("Cache \"" + cacheName + "\" exists. Updating."); updateCache(serverProfile, cacheName, cache); break; case create: logger.info("Cache \"" + cacheName + "\" already exists. Skipping."); break; case delete: logger.info("Cache \"" + cacheName + "\" already exists. Deleting."); deleteCache(serverProfile, cacheName); break; case sync: logger.info("Cache \"" + cacheName + "\" already exists. Deleting and recreating."); deleteCache(serverProfile, cacheName); logger.info("Creating Cache - " + cacheName); createCache(serverProfile, cache); break; } } else { switch (buildOption) { case create: case sync: case update: logger.info("Creating Cache - " + cacheName); createCache(serverProfile, cache); break; case delete: logger.info("Cache \"" + cacheName + "\" does not exist. Skipping."); break; } } } } catch (IOException e) { throw new MojoFailureException("Apigee network call error " + e.getMessage()); } catch (RuntimeException e) { throw e; } } /** * Entry point for the mojo. */ public void execute() throws MojoExecutionException, MojoFailureException { if (super.isSkip()) { getLog().info("Skipping"); return; } Logger logger = LoggerFactory.getLogger(CacheMojo.class); try { init(); if (buildOption == OPTIONS.none) { logger.info("Skipping Caches (default action)"); return; } if (serverProfile.getEnvironment() == null) { throw new MojoExecutionException("Apigee environment not found in profile"); } List caches = getEnvConfig(logger, "caches"); if (caches == null || caches.size() == 0) { logger.info("No cache config found."); return; } doUpdate(caches); } catch (MojoFailureException e) { throw e; } catch (RuntimeException e) { throw e; } } /*************************************************************************** * REST call wrappers **/ public static String createCache(ServerProfile profile, String cache) throws IOException { HttpResponse response = RestUtil.createEnvConfig(profile, "caches", cache); try { logger.info("Response " + response.getContentType() + "\n" + response.parseAsString()); if (response.isSuccessStatusCode()) logger.info("Create Success."); } catch (HttpResponseException e) { logger.error("Cache create error " + e.getMessage()); throw new IOException(e.getMessage()); } return ""; } public static String updateCache(ServerProfile profile, String cacheName, String cache) throws IOException { HttpResponse response = RestUtil.updateEnvConfig(profile, "caches", cacheName, cache); try { logger.info("Response " + response.getContentType() + "\n" + response.parseAsString()); if (response.isSuccessStatusCode()) logger.info("Update Success."); } catch (HttpResponseException e) { logger.error("Cache update error " + e.getMessage()); throw new IOException(e.getMessage()); } return ""; } public static String deleteCache(ServerProfile profile, String cacheName) throws IOException { HttpResponse response = RestUtil.deleteEnvConfig(profile, "caches", cacheName); try { logger.info("Response " + response.getContentType() + "\n" + response.parseAsString()); if (response.isSuccessStatusCode()) logger.info("Delete Success."); } catch (HttpResponseException e) { logger.error("Cache delete error " + e.getMessage()); throw new IOException(e.getMessage()); } return ""; } public static List getCache(ServerProfile profile) throws IOException { HttpResponse response = RestUtil.getEnvConfig(profile, "caches"); if (response == null) return new ArrayList(); JSONArray caches = null; try { logger.debug("output " + response.getContentType()); // response can be read only once String payload = response.parseAsString(); logger.debug(payload); /* Parsers fail to parse a string array. * converting it to an JSON object as a workaround */ String obj = "{ \"caches\": " + payload + "}"; JSONParser parser = new JSONParser(); JSONObject obj1 = (JSONObject) parser.parse(obj); caches = (JSONArray) obj1.get("caches"); } catch (ParseException pe) { logger.error("Get Cache parse error " + pe.getMessage()); throw new IOException(pe.getMessage()); } catch (HttpResponseException e) { logger.error("Get Cache error " + e.getMessage()); throw new IOException(e.getMessage()); } return caches; } }