Java tutorial
/* * Copyright (c) 2014 Hewlett-Packard Development Company, L.P. * * 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.hpcloud.mon; import com.fasterxml.jackson.databind.DeserializationFeature; import com.fasterxml.jackson.databind.PropertyNamingStrategy; import com.fasterxml.jackson.databind.SerializationFeature; import com.fasterxml.jackson.databind.module.SimpleModule; import com.hp.csbu.cc.middleware.TokenAuth; import com.hpcloud.messaging.kafka.KafkaHealthCheck; import com.hpcloud.mon.bundle.SwaggerBundle; import com.hpcloud.mon.infrastructure.servlet.MockAuthenticationFilter; import com.hpcloud.mon.infrastructure.servlet.PostAuthenticationFilter; import com.hpcloud.mon.infrastructure.servlet.PreAuthenticationFilter; import com.hpcloud.mon.resource.*; import com.hpcloud.mon.resource.exception.*; import com.hpcloud.mon.resource.serialization.SubAlarmExpressionSerializer; import com.hpcloud.util.Injector; import io.dropwizard.Application; import io.dropwizard.jdbi.bundles.DBIExceptionsBundle; import io.dropwizard.setup.Bootstrap; import io.dropwizard.setup.Environment; import javax.servlet.FilterRegistration.Dynamic; import javax.ws.rs.ext.ExceptionMapper; import java.util.*; /** * Monitoring API application. */ public class MonApiApplication extends Application<MonApiConfiguration> { public static void main(String[] args) throws Exception { new MonApiApplication().run(args); } @Override public void initialize(Bootstrap<MonApiConfiguration> bootstrap) { /** Configure bundles */ bootstrap.addBundle(new DBIExceptionsBundle()); bootstrap.addBundle(new SwaggerBundle()); } @Override public String getName() { return "HP Cloud Monitoring"; } @Override public void run(MonApiConfiguration config, Environment environment) throws Exception { /** Wire services */ Injector.registerModules(new MonApiModule(environment, config)); /** Configure resources */ environment.jersey().register(Injector.getInstance(VersionResource.class)); environment.jersey().register(Injector.getInstance(AlarmResource.class)); environment.jersey().register(Injector.getInstance(MetricResource.class)); environment.jersey().register(Injector.getInstance(MeasurementResource.class)); environment.jersey().register(Injector.getInstance(StatisticResource.class)); environment.jersey().register(Injector.getInstance(NotificationMethodResource.class)); /** Configure providers */ removeExceptionMappers(environment.jersey().getResourceConfig().getSingletons()); environment.jersey().register(new EntityExistsExceptionMapper()); environment.jersey().register(new EntityNotFoundExceptionMapper()); environment.jersey().register(new IllegalArgumentExceptionMapper()); environment.jersey().register(new InvalidEntityExceptionMapper()); environment.jersey().register(new JsonProcessingExceptionMapper()); environment.jersey().register(new JsonMappingExceptionManager()); environment.jersey().register(new ConstraintViolationExceptionMapper()); environment.jersey().register(new ThrowableExceptionMapper<Throwable>() { }); /** Configure Jackson */ environment.getObjectMapper() .setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES); environment.getObjectMapper().enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY); environment.getObjectMapper().disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); SimpleModule module = new SimpleModule("SerializationModule"); module.addSerializer(new SubAlarmExpressionSerializer()); environment.getObjectMapper().registerModule(module); /** Configure health checks */ environment.healthChecks().register("kafka", new KafkaHealthCheck(config.kafka)); /** Configure auth filters */ Dynamic preAuthenticationFilter = environment.servlets().addFilter("pre-auth", new PreAuthenticationFilter()); preAuthenticationFilter.addMappingForUrlPatterns(null, true, "/"); preAuthenticationFilter.addMappingForUrlPatterns(null, true, "/v2.0/*"); if (config.middleware.enabled) { Map<String, String> authInitParams = new HashMap<String, String>(); authInitParams.put("ServiceIds", config.middleware.serviceIds); authInitParams.put("EndpointIds", config.middleware.endpointIds); authInitParams.put("ServerVIP", config.middleware.serverVIP); authInitParams.put("ServerPort", config.middleware.serverPort); authInitParams.put("ConnTimeout", config.middleware.connTimeout); authInitParams.put("ConnSSLClientAuth", config.middleware.connSSLClientAuth); authInitParams.put("Keystore", config.middleware.keystore); authInitParams.put("KeystorePass", config.middleware.keystorePass); authInitParams.put("Truststore", config.middleware.truststore); authInitParams.put("TruststorePass", config.middleware.truststorePass); authInitParams.put("ConnPoolMaxActive", config.middleware.connPoolMaxActive); authInitParams.put("ConnPoolMaxIdle", config.middleware.connPoolMaxActive); authInitParams.put("ConnPoolEvictPeriod", config.middleware.connPoolEvictPeriod); authInitParams.put("ConnPoolMinIdleTime", config.middleware.connPoolMinIdleTime); authInitParams.put("ConnRetryTimes", config.middleware.connRetryTimes); authInitParams.put("ConnRetryInterval", config.middleware.connRetryInterval); Dynamic tokenAuthFilter = environment.servlets().addFilter("token-auth", new TokenAuth()); tokenAuthFilter.addMappingForUrlPatterns(null, true, "/"); tokenAuthFilter.addMappingForUrlPatterns(null, true, "/v2.0/*"); tokenAuthFilter.setInitParameters(authInitParams); } else { Dynamic mockAuthenticationFilter = environment.servlets().addFilter("mock-auth", new MockAuthenticationFilter()); mockAuthenticationFilter.addMappingForUrlPatterns(null, true, "/"); mockAuthenticationFilter.addMappingForUrlPatterns(null, true, "/v2.0/*"); } Dynamic postAuthenticationFilter = environment.servlets().addFilter("post-auth", new PostAuthenticationFilter(Collections.<String>singletonList(""))); postAuthenticationFilter.addMappingForUrlPatterns(null, true, "/"); postAuthenticationFilter.addMappingForUrlPatterns(null, true, "/v2.0/*"); /** Configure swagger */ SwaggerBundle.configure(config); } private void removeExceptionMappers(Set<Object> items) { for (Iterator<Object> i = items.iterator(); i.hasNext();) { Object o = i.next(); if (o instanceof ExceptionMapper) i.remove(); } } }