eu.cloudwave.wp5.monitoring.rest.FeedbackHandlerMonitoringClient.java Source code

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Here is the source code for eu.cloudwave.wp5.monitoring.rest.FeedbackHandlerMonitoringClient.java

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/*******************************************************************************
 * Copyright 2015 Software Evolution and Architecture Lab, University of Zurich
 * 
 * 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 eu.cloudwave.wp5.monitoring.rest;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import eu.cloudwave.wp5.common.constants.Headers;
import eu.cloudwave.wp5.common.constants.Urls;
import eu.cloudwave.wp5.common.dto.model.MetricContainingProcedureExecutionDto;
import eu.cloudwave.wp5.monitoring.dto.RunningProcedureExecution;
import eu.cloudwave.wp5.monitoring.properties.PropertiesLoader;

/**
 * Client that allows to send monitoring data to the Feedback Handler.
 */
public class FeedbackHandlerMonitoringClient {

    private static final String ACCESS_TOKEN = "monitoring.access_token";
    private static final String APP_ID = "monitoring.app_id";
    private static final String FEEDBACK_HANDLER_URL = "monitoring.feedback_handler_url";
    private static final String SLASH = "/";

    private PropertiesLoader propertiesLoader;

    public FeedbackHandlerMonitoringClient() {
        this.propertiesLoader = new PropertiesLoader();
    }

    /**
     * Sends monitoring data (i.e. the call trace) and its attached metrics to the Feedback Handler.
     * 
     * @param executions
     *          the {@link RunningProcedureExecution}'s (i.e. the call trace)
     * @return <code>true</code> if the data has been successfully sent to the Feedback Handler, <code>false</code>
     *         otherwise
     */
    public boolean postData(final RunningProcedureExecution rootProcedureExecution) {
        final MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
        headers.add(Headers.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE);
        headers.add(Headers.ACCESS_TOKEN, accessToken());
        headers.add(Headers.APPLICATION_ID, applicationId());
        final HttpEntity<MetricContainingProcedureExecutionDto> httpEntity = new HttpEntity<MetricContainingProcedureExecutionDto>(
                rootProcedureExecution, headers);
        final ResponseEntity<Boolean> result = new RestTemplate().exchange(url(), HttpMethod.POST, httpEntity,
                Boolean.class);
        return result.getBody();
    }

    private String accessToken() {
        return propertiesLoader.get(ACCESS_TOKEN).get();
    }

    private String applicationId() {
        return propertiesLoader.get(APP_ID).get();
    }

    private String url() {
        String rootUrl = propertiesLoader.get(FEEDBACK_HANDLER_URL).get();
        if (!rootUrl.endsWith(SLASH)) {
            rootUrl += SLASH;
        }
        return rootUrl + Urls.MONITORING__DATA;
    }

}