import java.time.LocalDateTime

// Obtain the Sampler name.
def samplerName = sampler.getName()

// Obtain the response body.
def responseBody = prev.getResponseDataAsString()

// Obtain the response code.
def responseCode = prev.getResponseCode()

// Obtain the current time.
def currentTime = LocalDateTime.now()

// Print logs.
log.info("Current Time: " + currentTime + ", Sampler Name: " + samplerName + ", Response Code: " + responseCode + ", Response Body: " + responseBody)

import org.apache.jmeter.assertions.AssertionResult;

// Obtain assertion results.
AssertionResult[] results = prev.getAssertionResults();

// Traverse assertion results.
for (int i = 0; i < results.length; i++) {
    AssertionResult result = results[i];
    if (result.isFailure() || result.isError()) {
        // Print assertion failure or error messages.
        log.info("Assertion failed: " + result.getFailureMessage());
    }
}

import org.apache.jmeter.assertions.AssertionResult;

// Obtain assertion results.
AssertionResult[] results = prev.getAssertionResults();

// Traverse assertion results.
for (int i = 0; i < results.length; i++) {
    AssertionResult result = results[i];
    if (result.isFailure() || result.isError()) {
        // Print assertion failure or error messages.
        log.info("Assertion failed: " + result.getFailureMessage());

        // Obtain the Sampler name.
        def samplerName = sampler.getName()
        
        // Obtain the response code.
        def responseCode = prev.getResponseCode()

        log.info("Sampler Name: " + samplerName + ", Response Code: " + responseCode)
    }
}