How to integrate the Play WS framework in the Java class library
How to integrate the Play WS framework in the Java class library
Introduction:
Play WS is a framework for HTTP network communication in Java applications. It provides a simple and easy -to -use method to send and receive HTTP requests.For the Java class library that needs to communicate with the external API, integrating the Play WS framework is a good choice.This article will introduce how to integrate the Play WS framework in the Java library and provide related programming code and configuration description.
Step 1: Add Play WS dependence
To use the PLAY WS framework, you first need to add corresponding dependencies to the construction file of the Java class library.You can manage dependencies through building tools such as Maven or Gradle.The following is an example code that adds Play WS dependencies:
<!-Maven add play ws dependencies->
<dependencies>
<dependency>
<groupId>com.typesafe.play</groupId>
<artifactId>play-ws_2.12</artifactId>
<version>2.8.2</version>
</dependency>
</dependencies>
// Add Play WS dependencies to Gradle
dependencies {
implementation 'com.typesafe.play:play-ws_2.12:2.8.2'
}
Step 2: Create Play WS client
In the Java class library, you can create the Play WS client through the following steps:
import play.libs.ws.*;
import play.libs.ws.ahc.*;
public class MyHttpClient {
private final WSClient ws;
public MyHttpClient() {
ws = AhcWSClient.create();
}
public WSResponse sendRequest(String url) throws Exception {
WSRequest request = ws.url(url);
WSResponse response = request.get().toCompletableFuture().get();
return response;
}
}
In the above code, we created a class called `MyHttpClient`, which initialized a Play WS client.`SendRequest` method is used to send HTTP get requests and return to the server response.
Step 3: Use the Play WS client to send a request
In the Java class library, use the Play WS client to send a request by instantiated `MyHttpClient` and call the` Sendrequest` method.The following is the example code:
public class Main {
public static void main(String[] args) {
MyHttpClient httpClient = new MyHttpClient();
try {
WSResponse response = httpClient.sendRequest("https://api.example.com/data");
System.out.println(response.getBody());
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above code, we instinctively `MyHttpClient`, and used its` Sendrequest` method to send a GET request.Finally, we printed the main content of the server response.
Configuration instructions:
When using the Play WS framework, you may need to add some additional configuration.Here are some common configuration examples:
-The configuration request timeout time:
import java.util.concurrent.TimeUnit;
import org.asynchttpclient.DefaultAsyncHttpClientConfig;
public class MyHttpClient {
private final WSClient ws;
public MyHttpClient() {
DefaultAsyncHttpClientConfig.Builder builder = new DefaultAsyncHttpClientConfig.Builder();
Builder.setReadtimeout (5000); // Set the timeout of the reading timeout for 5 seconds
ws = AhcWSClient.builder().setAsyncHttpClientConfig(builder.build()).build();
}
// ...
}
In the above code, we use the `defaultAlTasyNChttpClientconfig.builder` to create a configuration object and set a timeout timeout for 5 seconds.
-The HTTP proxy:
import org.asynchttpclient.DefaultAsyncHttpClientConfig;
import org.asynchttpclient.proxy.ProxyServer;
public class MyHttpClient {
private final WSClient ws;
public MyHttpClient() {
DefaultAsyncHttpClientConfig.Builder builder = new DefaultAsyncHttpClientConfig.Builder();
builder.setProxyServer(new ProxyServer.Builder("proxy.example.com", 8080).build());
ws = AhcWSClient.builder().setAsyncHttpClientConfig(builder.build()).build();
}
// ...
}
In the above code, we configure the HTTP proxy server to configure the HTTP proxy server to `Proxy.example.com: 8080`.
End words:
Through this article, you have learned how to integrate the Play WS framework in the Java class library.We introduced the process of adding dependencies, creating the Play WS client, and sending HTTP requests, and provided related programming code and configuration description.I hope this will be helpful for your HTTP network communication in the Java library!
