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OkHttp Synchronus Request Guide

Table of Contents

• [ Versions ](## Versions)
• [ Reference Articles ](## Reference Articles)
• [ OkHttp Synchronus Methods Summary ](## OkHttp Synchronus Methods Summary)
• [ Difference Between Synchronus and Asycnous Requests ](## Difference Between Synchronus and Asycnous Requests)
• [ Synchronus Request Flow Analysis ](## Synchronus Request Flow Analysis)

Versions

• Compile com.squareup.okhttp3:okhttp:3.9.0 for OkHttp dependencies

Reference Articles

• OkHttp Synchronus Methods Summary
• OkHttp Asycnous Methods Summary

OkHttp Synchronus Methods Summary

Notes:

• Synchronus requests enter a blocked state until a response is received

Example Code:

OkHttpClient mClient = new OkHttpClient.Builder().build();Request request = new Request.Builder().url("http://www.baidu.com").get().build();Call call = mClient.newCall(request);try {    Response response = call.execute();    LogUtils.json(response.body().string());} catch (IOException e) {    e.printStackTrace();}

OkHttp Asycnous Methods Summary

Notes:

• onResponse() and onFailure() callbacks are executed in the worker thread

Example Code:

OkHttpClient mClient = new OkHttpClient.Builder().build();Request request = new Request.Builder().url("http://www.baidu.com").get().build();Call call = mClient.newCall(request);call.enqueue(new Callback() {    @Override    public void onFailure(Call call, IOException e) {    }    @Override    public void onResponse(Call call, Response response) throws IOException {        LogUtils.json(response.body().string());        runOnUiThread(new Runnable() {            @Override            public void run() {                tvShow.setText("eeeeee");            }        });    }});

Difference Between Synchronus and Asycnous Requests

Synchronus Request Flow Analysis

Step 1: Create OkHttp Client

OkHttpClient mClient = new OkHttpClient.Builder().build();

Explanation:

• Internal Builder class initializes various components like Dispatcher and Connection Pool
• Connection Pool manages client-server connections and can reuse connections for same URLs

Step 2: Create Request Object

Request request = new Request.Builder().url("http://www.baidu.com").get().build();

Explanation:

• Builder pattern constructs Request with URL, method, headers, and body

Step 3: Wrap Request into Call

Call call = mClient.newCall(request);

Explanation:

• Call acts as a bridge between Request and Response-
  implementation handles actual network operations

Step 4: Execute Synchronus Request

Call call = mClient.newCall(request);try {    Response response = call.execute();    LogUtils.json(response.body().string());} catch (IOException e) {    e.printStackTrace();}

Explanation:

• execute() method sends synchronus request
• Response handling and logging
• IOException handling for common network issues

Dispatcher and Synchronus Flow

• Dispatcher manages call execution
• Synchronus calls are added to runningSyncCalls queue
• Each call execution blocks until completion

Connection Pool Management

• Connection Pool optimizes network usage
• Reuse connections for repeated requests
• Manage connection lifecycle effectively

By following this guide, developers can effectively utilize OkHttp's synchronus and asycnous features in their applications, ensuring efficient network communication.

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