*
     * @param project The project being summarized, must not be {@code null}.
     * @param execTime The exec time of the project in milliseconds.
     * @param wallTime The wall time of the project in milliseconds.
     * @param cause The cause of the build failure, may be {@code null}.
     */
    public BuildFailure(MavenProject project, long execTime, long wallTime, Throwable cause) {

        switch ( this.opCode ) {
        case QUERY:
            opCodeString = "QUERY";
            break;
        case WACK:
            opCodeString = "WACK";
            break;
        default:
            opCodeString = Integer.toString(this.opCode);
            break;
        }
        switch ( this.resultCode ) {
        case FMT_ERR:

                recordClassString;

        switch( opCode ) {
            case QUERY:
                opCodeString = "QUERY";
                break;
            case WACK:
                opCodeString = "WACK";
                break;
            default:
                opCodeString = Integer.toString( opCode );
                break;
        }
        switch( resultCode ) {

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* <a href="https://training.talkpython.fm/fastapi-courses" class="external-link" target="_blank">Talk Python Training</a>

    }

    /**
     * Creates a new build summary for the specified project.
     *
     * @param project The project being summarized, must not be {@code null}.
     * @param wallTime The wall time of the project in milliseconds.
     * @param execTime The exec time of the project in milliseconds.
     */
    public BuildSuccess(MavenProject project, long wallTime, long execTime) {

<img src="/img/tutorial/sub-applications/image02.png">

If you try interacting with any of the two user interfaces, they will work correctly, because the browser will be able to talk to each specific app or sub-app.

### Technical Details: `root_path`

 *
 * <p>In contrast, <i>wall time</i> is a reading of "now" as given by a method like
 * {@link System#currentTimeMillis()}, best represented as an {@link java.time.Instant}. Such values
 * <i>can</i> be subtracted to obtain a {@code Duration} (such as by {@code Duration.between}), but
 * doing so does <i>not</i> give a reliable measurement of elapsed time, because wall time readings

## Prerequisites

Install Dex by following [Dex Getting Started Guide](https://dexidp.io/docs/getting-started/)

### Start Dex

```

    assertFailsToDecode(base64(), "Wf2!", "Unrecognized character: !");
    // This sentence just isn't base64() encoded.
    assertFailsToDecode(base64(), "let's not talk of love or chains!");
    // A 4n+1 length string is never legal base64().
    assertFailsToDecode(base64(), "12345", "Invalid input length 5");

#### Framed protocols

Framed protocols like http/2 don't lend themselves to blocking APIs. Each application-layer thread wants to do blocking I/O for a specific stream, but the streams are multiplexed on the socket. You can't just talk to the socket, you need to cooperate with the other application-layer threads that you're sharing it with.