opentelemetry-java-instrume.../instrumentation/apache-httpclient/apache-httpclient-5.2/library/README.md

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# Library Instrumentation for Apache Http client version 5.2
Provides OpenTelemetry instrumentation for [Apache Http Client 5.2](https://hc.apache.org/httpcomponents-client-5.2.x/).
## Quickstart
### Add these dependencies to your project
Replace `OPENTELEMETRY_VERSION` with the [latest
release](https://search.maven.org/search?q=g:io.opentelemetry.instrumentation%20AND%20a:opentelemetry-apache-httpclient-5.2).
For Maven, add to your `pom.xml` dependencies:
```xml
<dependencies>
<dependency>
<groupId>io.opentelemetry.instrumentation</groupId>
<artifactId>opentelemetry-apache-httpclient-5.2</artifactId>
<version>OPENTELEMETRY_VERSION</version>
</dependency>
</dependencies>
```
For Gradle, add to your dependencies:
```groovy
implementation("io.opentelemetry.instrumentation:opentelemetry-apache-httpclient-5.2:OPENTELEMETRY_VERSION")
```
### Usage
The instrumentation library provides the class `ApacheHttpClient5Telemetry` that has a builder
method and allows the creation of an instance of the `HttpClientBuilder` to provide
OpenTelemetry-based spans and context propagation:
```java
import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.instrumentation.apachehttpclient.v5_2.ApacheHttpClient5Telemetry;
import org.apache.hc.client5.http.classic.HttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
public class ApacheHttpClient5Configuration {
private OpenTelemetry openTelemetry;
public ApacheHttpClient5Configuration(OpenTelemetry openTelemetry) {
this.openTelemetry = openTelemetry;
}
// creates a new http client builder for constructing http clients with open telemetry instrumentation
public HttpClientBuilder createBuilder() {
return ApacheHttpClient5Telemetry.builder(openTelemetry).build().newHttpClientBuilder();
}
// creates a new http client with open telemetry instrumentation
public HttpClient newHttpClient() {
return ApacheHttpClient5Telemetry.builder(openTelemetry).build().newHttpClient();
}
}
```