org.rippleosi.common.service.proxies.DefaultRequestProxy.java Source code

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Here is the source code for org.rippleosi.common.service.proxies.DefaultRequestProxy.java

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/*
 * Copyright 2015 Ripple OSI
 *
 *    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.rippleosi.common.service.proxies;

import java.util.Map;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.codec.binary.Base64;
import org.rippleosi.common.exception.InvalidDataException;
import org.rippleosi.common.model.QueryPost;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

/**
 */
@Service
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE, proxyMode = ScopedProxyMode.TARGET_CLASS)
public class DefaultRequestProxy implements RequestProxy {

    @Value("${c4hOpenEHR.address}")
    private String openEhrAddress;

    @Value("${c4hOpenEHR.user}")
    private String openEhrUsername;

    @Value("${c4hOpenEHR.password}")
    private String openEhrPassword;

    @Override
    public <T> ResponseEntity<T> getQueryWithoutSession(String uri, Class<T> cls) {

        HttpEntity<String> request = buildRequestWithoutSession(null);

        return restTemplate().exchange(uri, HttpMethod.GET, request, cls);
    }

    @Override
    public <T> ResponseEntity<T> postQueryWithoutSession(String uri, Class<T> cls, QueryPost body) {

        String json = convertObjectToJson(body);

        HttpEntity<String> request = buildRequestWithoutSession(json);

        return restTemplate().exchange(uri, HttpMethod.POST, request, cls);
    }

    @Override
    public <T> ResponseEntity<T> postWithoutSession(String uri, Class<T> cls, Object body) {

        String json = convertObjectToJson(body);

        HttpEntity<String> request = buildRequestWithoutSession(json);

        return restTemplate().exchange(uri, HttpMethod.POST, request, cls);
    }

    @Override
    public <T> ResponseEntity<T> putWithoutSession(String uri, Class<T> cls, Object body) {

        String json = convertObjectToJson(body);

        HttpEntity<String> request = buildRequestWithoutSession(json);

        return restTemplate().exchange(uri, HttpMethod.PUT, request, cls);
    }

    private HttpEntity<String> buildRequestWithoutSession(String body) {

        String credentials = openEhrUsername + ":" + openEhrPassword;
        byte[] base64 = Base64.encodeBase64(credentials.getBytes());
        String encoded = new String(base64);

        HttpHeaders headers = new HttpHeaders();
        headers.add(HttpHeaders.AUTHORIZATION, "Basic " + encoded);
        headers.add(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE);
        headers.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);

        return new HttpEntity<>(body, headers);
    }

    private RestTemplate restTemplate() {
        return new RestTemplate(new SimpleClientHttpRequestFactory());
    }

    private String convertObjectToJson(Object body) {
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            return objectMapper.writeValueAsString(body);
        } catch (JsonProcessingException ex) {
            throw new InvalidDataException(ex.getMessage(), ex);
        }
    }
}