# Lifespan Events { #lifespan-events }

You can define logic (code) that should be executed before the application **starts up**. This means that this code will be executed **once**, **before** the application **starts receiving requests**.

The same way, you can define logic (code) that should be executed when the application is **shutting down**. In this case, this code will be executed **once**, **after** having handled possibly **many requests**.

	if err != nil {
		t.Fatalf("Test %s: Failed to create HTTP request for RemoveBucketHandler: <ERROR> %v", instanceType, err)
	}
	// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.
	// Call the ServeHTTP to execute the handler.
	apiRouter.ServeHTTP(rec, req)
	switch rec.Code {
	case http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent:

        assertTrue(result >= 0);
    }

    // Test FilePurgeVisitor getDocId
    public void test_FilePurgeVisitor_getDocId() throws IOException {
        // Test the getDocId logic without creating actual FilePurgeVisitor
        // The logic converts path to doc ID by removing path separators
        String pathStr = "_1/_2/docid123";
        String expectedDocId = "_1_2docid123";

# Custom Request and APIRoute class { #custom-request-and-apiroute-class }

In some cases, you may want to override the logic used by the `Request` and `APIRoute` classes.

In particular, this may be a good alternative to logic in a middleware.

For example, if you want to read or manipulate the request body before it is processed by your application.

/// danger

This is an "advanced" feature.

        }

        @Override
        public String getServicePackageName() {
            return "service";
        }

        @Override
        public String getLogicPackageName() {
            return "logic";
        }

        @Override
        public String getImplementationSuffix() {
            return "Impl";
        }

        @Override
        public String getJobSuffix() {

        // Since 34464 is within the 16-bit range but could still be considered excessive for security buffer,
        // let's test the actual validation logic instead
        byte[] buffer2 = createBasicNegotiateResponseBuffer();
        // Set maximum 16-bit value
        SMBUtil.writeInt2(65535, buffer2, 58);

		if err != nil {
			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
		}
		// Since `apiRouter` satisfies `http.Handler` it has a ServeHTTP to execute the logic of the handler.
		// Call the ServeHTTP to execute the handler.
		apiRouter.ServeHTTP(recV4, reqV4)
		if recV4.Code != testCase.expectedRespStatus {

import model.Stage

class BuildLogicTest(
    model: CIBuildModel,
    stage: Stage,
) : OsAwareBaseGradleBuildType(os = Os.LINUX, stage = stage, init = {
        id(buildTypeId(model))
        name = "Build-logic test"
        description = "Run :build-logic:test"

        features {
            publishBuildStatusToGithub(model)
        }

        applyDefaults(
            model,
            this,

                outputFile.delete();
            }
        }
    }

    // Test variable replacement logic without triggering component dependencies
    public void test_variable_replacement_logic() throws Exception {
        // Test the variable replacement logic directly
        final List<String> commands =

        assertEquals("Service", result[0]);
        assertEquals("ServiceImpl", result[1]);
        assertEquals("Facade", result[2]);
        assertEquals("FacadeImpl", result[3]);
        assertEquals("Logic", result[4]);
        assertEquals("LogicImpl", result[5]);
    }

    // Test toBeDisposable with null process
    public void test_toBeDisposable_nullProcess() {
        // Should not throw exception