[BAEL-6481] - Stop Executing Further Code in Java (#14076)
* Creating a Deep vs Shallow Copy of an Object in Java * [BAEL-6481]-Stop Executing Further Code in Java * [BAEL-6481] - Stop Executing Further Code in Java * [BAEL-6481] - Stop Executing Further Code in Java * [BAEL-6481] - Stop Executing Further Code in Java. * [BAEL-6481] - Stop Executing Further Code in Java. * [BAEL-6481] - Stop Executing Further Code in Java. * [BAEL-6481] Stop Executing Further Code in Java. * [BAEL-6481] Stop Executing Further Code in Java. Moved to core java numbers - 6 * [BAEL-6481] Stop Executing Further Code in Java. * [BAEL-6481] Stop Executing Further Code in Java. * [BAEL-6481] Stop Executing Further Code in Java. * [BAEL-6481] Stop Executing Further Code in Java. [Commented the Test cases] * [BAEL-6481] Stop Executing Further Code in Java. [Commented the Two Test] * [BAEL-6481] Stop Executing Further Code in Java. [Fixed Method Name's]
This commit is contained in:
Partha Sutradhar
GitHub
parent
e337b6dff3
commit
228598db3c
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package com.baeldung.stopexecution;
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public class InterruptThread extends Thread {
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@Override
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public void run() {
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while (!isInterrupted()) {
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if (isInterrupted()) {
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break;
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}
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// business logic
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}
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}
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}
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package com.baeldung.stopexecution;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.Locale;
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public class StopExecutionFurtherCode {
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boolean shouldContinue = true;
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int performTask(int a, int b) {
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if (!shouldContinue) {
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System.exit(0);
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}
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return a + b;
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}
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void stop() {
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this.shouldContinue = false;
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}
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int calculateFactorial(int n) {
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if (n <= 1) {
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return 1; // base case
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}
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return n * calculateFactorial(n - 1);
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}
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int calculateSum(int[] x) {
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int sum = 0;
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for (int i = 0; i < 10; i++) {
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if (x[i] < 0) {
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break;
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}
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sum += x[i];
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}
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return sum;
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}
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<T> T stopExecutionUsingException(T object) {
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if (object instanceof Number) {
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throw new IllegalArgumentException("Parameter can not be number.");
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}
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T upperCase = (T) String.valueOf(object)
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.toUpperCase(Locale.ENGLISH);
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return upperCase;
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}
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int processLines(String[] lines) {
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int statusCode = 0;
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parser:
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for (String line : lines) {
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System.out.println("Processing line: " + line);
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if (line.equals("stop")) {
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System.out.println("Stopping parsing...");
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statusCode = -1;
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break parser; // Stop parsing and exit the loop
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}
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System.out.println("Line processed.");
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}
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return statusCode;
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}
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void download(String fileUrl, String destinationPath) throws MalformedURLException {
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if (fileUrl == null || fileUrl.isEmpty() || destinationPath == null || destinationPath.isEmpty()) {
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return;
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}
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// execute downloading
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URL url = new URL(fileUrl);
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try (InputStream in = url.openStream(); FileOutputStream out = new FileOutputStream(destinationPath)) {
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byte[] buffer = new byte[1024];
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int bytesRead;
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while ((bytesRead = in.read(buffer)) != -1) {
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out.write(buffer, 0, bytesRead);
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}
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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}
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package com.baeldung.stopexecution;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotEquals;
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import static org.junit.Assert.assertThrows;
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import static org.junit.Assert.assertTrue;
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import java.net.MalformedURLException;
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import org.junit.Assert;
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import org.junit.FixMethodOrder;
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import org.junit.jupiter.api.Test;
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import org.junit.runners.MethodSorters;
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@FixMethodOrder(MethodSorters.NAME_ASCENDING)
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public class StopExecutionFurtherCodeUnitTest {
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@Test
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void givenExecution_whenStopIsNotCalled_thenTaskIsPerformed() {
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StopExecutionFurtherCode stopExecution = new StopExecutionFurtherCode();
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int performedTask = stopExecution.performTask(10, 20);
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Assert.assertEquals(30, performedTask);
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}
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// This test case have been commented because, otherwise, the program will exit since System.exit(statusCode) is being used.
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/*@Test
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void givenExecution_whenStopIsCalled_thenTaskNotPerformed() {
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StopExecutionFurtherCode stopExecution = new StopExecutionFurtherCode();
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stopExecution.stop();
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int performedTask = stopExecution.performTask(10, 20);
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Assert.assertEquals(30, performedTask);
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}*/
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@Test
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void givenWrongUrlAndPath_whenDownloadCalled_thenExecutionIsStopped() throws MalformedURLException {
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StopExecutionFurtherCode stopExecutionFurtherCode = new StopExecutionFurtherCode();
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stopExecutionFurtherCode.download("", "");
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}
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@Test
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void givenName_whenStopExecutionUsingExceptionCalled_thenNameIsConvertedToUpper() {
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StopExecutionFurtherCode stopExecutionFurtherCode = new StopExecutionFurtherCode();
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String name = "John";
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String result1 = stopExecutionFurtherCode.stopExecutionUsingException(name);
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Assert.assertEquals("JOHN", result1);
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try {
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Integer number1 = 10;
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Assert.assertThrows(IllegalArgumentException.class, () -> {
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int result = stopExecutionFurtherCode.stopExecutionUsingException(number1);
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});
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} catch (Exception e) {
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Assert.fail("Unexpected exception thrown: " + e.getMessage());
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}
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}
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@Test
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void givenBaseCase_whenStopExecutionWhenBaseCaseKnownCalled_thenFactorialIsCalculated() throws MalformedURLException {
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StopExecutionFurtherCode stopExecutionFurtherCode = new StopExecutionFurtherCode();
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int factorial = stopExecutionFurtherCode.calculateFactorial(1);
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Assert.assertEquals(1, factorial);
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}
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@Test
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void givenArrayWithNegative_whenStopExecutionInLoopCalled_thenSumIsCalculatedIgnoringNegatives() {
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StopExecutionFurtherCode stopExecutionFurtherCode = new StopExecutionFurtherCode();
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int[] nums = { 1, 2, 3, -1, 1, 2, 3 };
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int sum = stopExecutionFurtherCode.calculateSum(nums);
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Assert.assertEquals(6, sum);
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}
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@Test
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void givenThreadRunning_whenInterrupted_thenThreadExecutionIsStopped() throws InterruptedException {
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InterruptThread stopExecution = new InterruptThread();
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stopExecution.start();
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Thread.sleep(2000);
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stopExecution.interrupt();
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stopExecution.join();
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Assert.assertTrue(!stopExecution.isAlive());
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}
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@Test
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void givenLinesWithStopLabel_whenStopExecutionLabeledLoopCalled_thenLoopExecutionIsStopped() {
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StopExecutionFurtherCode furtherCode = new StopExecutionFurtherCode();
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final String[] lines = { "Line 1", "Line 2", "Line 3", "stop", "Line 4", "Line 5" };
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int statusCode = furtherCode.processLines(lines);
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Assert.assertEquals(-1, statusCode);
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}
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}
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