// Add events to buffer
        ComponentUtil.getLogNotificationHelper()
                .offer(new LogNotificationEvent(System.currentTimeMillis(), "ERROR", "org.test", "msg1", null));
        ComponentUtil.getLogNotificationHelper()
                .offer(new LogNotificationEvent(System.currentTimeMillis(), "WARN", "org.test", "msg2", null));

        .readTimeout(500, TimeUnit.MILLISECONDS)
        .build();
    try (Response response = client1.newCall(request).execute()) {
      System.out.println("Response 1 succeeded: " + response);
    } catch (IOException e) {
      System.out.println("Response 1 failed: " + e);
    }

    // Copy to customize OkHttp for this request.
    OkHttpClient client2 = client.newBuilder()

        // This test verifies that the handler resolution mechanism correctly skips the 'jcifs'
        // package when it is listed in the 'java.protocol.handler.pkgs' system property.
        // We use mock handlers since actual system handlers might not be available in test environment.
        System.setProperty("java.protocol.handler.pkgs", "jcifs");
        setupMockProtocolHandlers();
        URL url = new URL("http://example.com/resource");

        PrintStream originalErr = System.err;
        try {
            ByteArrayOutputStream errContent = new ByteArrayOutputStream();
            System.setErr(new PrintStream(errContent));

            String[] args = { "--help" };
            // Note: main calls System.exit, so we can't test it directly
            // Instead, we test the parsing logic separately

            System.setErr(originalErr);

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets client { #websockets-client }

### In production { #in-production }

In your production system, you probably have a frontend created with a modern framework like React, Vue.js or Angular.

And to communicate using WebSockets with your backend you would probably use your frontend's utilities.

                synchronized (this) {
                    ltime = System.currentTimeMillis();
                    wait();
                }

                try {
                    final double r = Math.random();
                    if (r < 0.333) {
                        f.exists();
                        //                      System.out.print('e');
                    } else if (r < 0.667) {

        try {
            parser.parseArgument(args);
        } catch (final CmdLineException e) {
            System.err.println(e.getMessage());
            System.err.println("java " + Crawler.class.getCanonicalName() + " [options...] arguments...");
            parser.printUsage(System.err);
            return;
        }

        if (logger.isDebugEnabled()) {
            try {

      response2Body = response2.body().string();
      System.out.println("Response 2 response:          " + response2);
      System.out.println("Response 2 cache response:    " + response2.cacheResponse());
      System.out.println("Response 2 network response:  " + response2.networkResponse());
    }

    System.out.println("Response 2 equals Response 1? " + response1Body.equals(response2Body));
  }

     * The client implementation is determined by the system property.
     */
    public SwitchableHttpClient() {
        super();
        selectClient();
    }

    /**
     * Selects the appropriate HTTP client based on system property.
     */
    protected void selectClient() {
        final String clientType = System.getProperty(HTTP_CLIENT_PROPERTY);

                        + System.getProperty("maven.home", "<unknown Maven " + "home>")))
                .append(ls);
        version.append("Java version: ")
                .append(System.getProperty("java.version", "<unknown Java version>"))
                .append(", vendor: ")
                .append(System.getProperty("java.vendor", "<unknown vendor>"))
                .append(", runtime: ")