tools.RequestSendingRunnable.java Source code

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Here is the source code for tools.RequestSendingRunnable.java

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/*
 * Copyright 2013-2015 the original author or authors.
 *
 * 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 tools;

import java.net.URI;
import java.util.Random;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.cloud.sleuth.Span;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.RequestEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

import static org.assertj.core.api.BDDAssertions.then;

/**
 * Runnable that will send a request via the provide rest template to the
 * given url. It will also append the provided TraceID as the request's header
 *
 * @author Marcin Grzejszczak
 */
public class RequestSendingRunnable implements Runnable {

    private static final Log log = LogFactory.getLog(RequestSendingRunnable.class);

    private final RestTemplate restTemplate;
    private final String url;
    private final long traceId;
    private final Random random = new Random();
    private final long spanId;

    public RequestSendingRunnable(RestTemplate restTemplate, String url, long traceId, Long spanId) {
        this.restTemplate = restTemplate;
        this.url = url;
        this.traceId = traceId;
        this.spanId = spanId != null ? spanId : this.random.nextLong();
    }

    @Override
    public void run() {
        log.info(String.format("Sending the request to url [%s] with trace id in headers [%d]", this.url,
                this.traceId));
        ResponseEntity<String> responseEntity = this.restTemplate.exchange(requestWithTraceId(), String.class);
        then(responseEntity.getStatusCode()).isEqualTo(HttpStatus.OK);
        log.info(String.format("Received the following response [%s]", responseEntity));
    }

    private RequestEntity<Void> requestWithTraceId() {
        HttpHeaders headers = new HttpHeaders();
        headers.add(Span.TRACE_ID_NAME, Span.idToHex(this.traceId));
        headers.add(Span.SPAN_ID_NAME, Span.idToHex(this.spanId));
        URI uri = URI.create(this.url);
        RequestEntity<Void> requestEntity = new RequestEntity<>(headers, HttpMethod.GET, uri);
        log.info("Request [" + requestEntity + "] is ready");
        return requestEntity;
    }
}