| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.datatorrent.stram.util; |
| |
| import java.io.IOException; |
| import java.security.Principal; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.Future; |
| |
| import com.sun.jersey.api.client.AsyncWebResource; |
| import com.sun.jersey.api.client.Client; |
| import com.sun.jersey.api.client.WebResource; |
| import com.sun.jersey.api.client.async.ITypeListener; |
| import com.sun.jersey.api.client.config.ClientConfig; |
| import com.sun.jersey.api.client.config.DefaultClientConfig; |
| import com.sun.jersey.api.client.filter.ClientFilter; |
| import com.sun.jersey.client.apache4.ApacheHttpClient4Handler; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.http.auth.AuthSchemeProvider; |
| import org.apache.http.auth.AuthScope; |
| import org.apache.http.auth.Credentials; |
| import org.apache.http.client.CredentialsProvider; |
| import org.apache.http.client.config.AuthSchemes; |
| import org.apache.http.config.Lookup; |
| import org.apache.http.config.RegistryBuilder; |
| import org.apache.http.impl.auth.SPNegoSchemeFactory; |
| import org.apache.http.impl.client.BasicCookieStore; |
| import org.apache.http.impl.client.BasicCredentialsProvider; |
| import org.apache.http.impl.client.HttpClientBuilder; |
| import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; |
| |
| /** |
| * <p>WebServicesClient class.</p> |
| * |
| * @since 0.3.2 |
| */ |
| public class WebServicesClient |
| { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(WebServicesClient.class); |
| |
| private static final PoolingHttpClientConnectionManager connectionManager; |
| private static final CredentialsProvider credentialsProvider; |
| private static final int DEFAULT_CONNECT_TIMEOUT = 10000; |
| private static final int DEFAULT_READ_TIMEOUT = 10000; |
| |
| private final Client client; |
| |
| private final Set<ClientFilter> clientFilters = new HashSet<>(); |
| |
| static { |
| connectionManager = new PoolingHttpClientConnectionManager(); |
| connectionManager.setMaxTotal(200); |
| connectionManager.setDefaultMaxPerRoute(5); |
| credentialsProvider = new BasicCredentialsProvider(); |
| credentialsProvider.setCredentials(AuthScope.ANY, new Credentials() { |
| |
| @Override |
| public Principal getUserPrincipal() |
| { |
| return null; |
| } |
| |
| @Override |
| public String getPassword() |
| { |
| return null; |
| } |
| |
| }); |
| } |
| |
| public WebServicesClient() |
| { |
| this(new DefaultClientConfig()); |
| client.getProperties().put(ClientConfig.PROPERTY_FOLLOW_REDIRECTS, true); |
| client.getProperties().put(ClientConfig.PROPERTY_CONNECT_TIMEOUT, DEFAULT_CONNECT_TIMEOUT); |
| client.getProperties().put(ClientConfig.PROPERTY_READ_TIMEOUT, DEFAULT_READ_TIMEOUT); |
| } |
| |
| public WebServicesClient(ClientConfig config) |
| { |
| if (UserGroupInformation.isSecurityEnabled()) { |
| HttpClientBuilder httpClientBuilder = HttpClientBuilder.create(); |
| httpClientBuilder.setConnectionManager(connectionManager); |
| httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider); |
| Lookup<AuthSchemeProvider> authProviders = RegistryBuilder.<AuthSchemeProvider>create() |
| .register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true)) |
| .build(); |
| httpClientBuilder.setDefaultAuthSchemeRegistry(authProviders); |
| ApacheHttpClient4Handler httpClientHandler = new ApacheHttpClient4Handler(httpClientBuilder.build(), new BasicCookieStore(), false); |
| client = new Client(httpClientHandler, config); |
| } else { |
| client = Client.create(config); |
| } |
| } |
| |
| public WebServicesClient(Client client) { |
| this.client = client; |
| } |
| |
| public Client getClient() { |
| return client; |
| } |
| |
| // A bug in jersey Client results in a ClassCastException when using the built-in method in Client to check if |
| // the filter is already present. Hence using a wrapper method to keep track of added filters. |
| public boolean isFilterPresent(ClientFilter clientFilter) |
| { |
| return clientFilters.contains(clientFilter); |
| } |
| |
| public void addFilter(ClientFilter clientFilter) |
| { |
| client.addFilter(clientFilter); |
| clientFilters.add(clientFilter); |
| } |
| |
| public void clearFilters() |
| { |
| client.removeAllFilters(); |
| clientFilters.clear(); |
| } |
| |
| public <T> T process(String url, Class<T> clazz, WebServicesHandler<T> handler) throws IOException |
| { |
| WebResource wr = client.resource(url); |
| return process(wr.getRequestBuilder(), clazz, handler); |
| } |
| public <T> Future<T> process(String url, final ITypeListener<T> listener, WebServicesAsyncHandler<T> handler) throws IOException { |
| AsyncWebResource wr = client.asyncResource(url); |
| return process(wr, listener, handler); |
| } |
| |
| public <T> T process(final WebResource.Builder wr, final Class<T> clazz, final WebServicesHandler<T> handler) throws IOException { |
| return SecureExecutor.execute(new SecureExecutor.WorkLoad<T>(){ |
| @Override |
| public T run() |
| { |
| return handler.process(wr, clazz); |
| } |
| }); |
| } |
| |
| public <T> Future<T> process(final AsyncWebResource wr, final ITypeListener<T> listener, final WebServicesAsyncHandler<T> handler) throws IOException { |
| return SecureExecutor.execute(new SecureExecutor.WorkLoad<Future<T>>(){ |
| @Override |
| public Future<T> run() |
| { |
| return handler.process(wr, listener); |
| } |
| }); |
| } |
| |
| /** |
| * |
| * @param <T> |
| */ |
| public static abstract class WebServicesHandler<T> { |
| public abstract T process(WebResource.Builder webResource, Class<T> clazz); |
| |
| @Override |
| public String toString() |
| { |
| return "WebServicesHandler{Abstract class Useful in Future}"; |
| } |
| } |
| |
| /** |
| * |
| * @param <T> |
| */ |
| public static abstract class WebServicesAsyncHandler<T> { |
| public abstract Future<T> process(AsyncWebResource webResource, ITypeListener<T> listener); |
| |
| @Override |
| public String toString() |
| { |
| return "WebServicesAsyncHandler{Abstract class Useful in Future}"; |
| } |
| } |
| |
| public static class GetWebServicesHandler<T> extends WebServicesHandler<T> { |
| |
| @Override |
| public T process(WebResource.Builder webResource, Class<T> clazz) |
| { |
| return webResource.get(clazz); |
| } |
| |
| } |
| public static class GetWebServicesAsyncHandler<T> extends WebServicesAsyncHandler<T> { |
| |
| @Override |
| public Future<T> process(AsyncWebResource webResource, ITypeListener<T> listener) |
| { |
| return webResource.get(listener); |
| } |
| |
| } |
| |
| public static class DeleteWebServicesHandler<T> extends WebServicesHandler<T> |
| { |
| @Override |
| public T process(WebResource.Builder webResource, Class<T> clazz) |
| { |
| return webResource.delete(clazz); |
| } |
| |
| } |
| |
| public static class DeleteWebServicesAsyncHandler<T> extends WebServicesAsyncHandler<T> |
| { |
| @Override |
| public Future<T> process(AsyncWebResource webResource, ITypeListener<T> listener) |
| { |
| return webResource.delete(listener); |
| } |
| |
| } |
| } |