org.trustedanalytics.servicebroker.hdfs.users.UaaClientTokenRetriver.java Source code

Introduction

Here is the source code for org.trustedanalytics.servicebroker.hdfs.users.UaaClientTokenRetriver.java

Source

/**
 * Copyright (c) 2015 Intel 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 org.trustedanalytics.servicebroker.hdfs.users;

import java.net.URI;
import java.util.Arrays;

import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.HttpClientBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;
import org.trustedanalytics.servicebroker.hdfs.config.uaa.UaaConfiguration;
import org.trustedanalytics.servicebroker.hdfs.users.entity.UaaTokenResponse;

@Component
class UaaClientTokenRetriver {

    private static final String GRANT_TYPE = "grant_type";
    private static final String GRANT_TYPE_CREDENTIALS = "client_credentials";
    private static final String RESPONSE_TYPE = "response_type";
    private static final String RESPONSE_TYPE_TOKEN = "token";
    private static final String PARAMETERS = "paramteres";

    private final UaaConfiguration uaaConfiguration;
    private final RestTemplate uaaRestTemplate;

    @Autowired
    public UaaClientTokenRetriver(UaaConfiguration configuration) {
        this.uaaConfiguration = configuration;
        this.uaaRestTemplate = createRestTemplate();
    }

    public String getToken() {
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);

        URI uaaUri = UriComponentsBuilder.fromHttpUrl(uaaConfiguration.getTokenUri())
                .queryParam(GRANT_TYPE, GRANT_TYPE_CREDENTIALS).queryParam(RESPONSE_TYPE, RESPONSE_TYPE_TOKEN)
                .build().encode().toUri();
        HttpEntity<String> entity = new HttpEntity<>(PARAMETERS, headers);
        return uaaRestTemplate.postForObject(uaaUri, entity, UaaTokenResponse.class).getAccessToken();
    }

    private RestTemplate createRestTemplate() {
        BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(
                uaaConfiguration.getClientId(), uaaConfiguration.getClientSecret()));
        HttpClient httpClient = HttpClientBuilder.create().setDefaultCredentialsProvider(credentialsProvider)
                .build();

        return new RestTemplate(new HttpComponentsClientHttpRequestFactory(httpClient));
    }
}