Add getJobInstance method in JobExplorer/JobRepository

Resolves #3930

spring-batch-core/src/test/java/org/springframework/batch/core/configuration/xml/DummyJobRepository.java

@@ -32,6 +32,8 @@ import org.springframework.lang.Nullable;
  * @author Dan Garrette
  * @author David Turanski
  * @author Mahmoud Ben Hassine
+ * @author Parikshit Dutta
+ *
  * @since 2.0.1
  */
 public class DummyJobRepository implements JobRepository, BeanNameAware {
@@ -57,6 +59,12 @@ public class DummyJobRepository implements JobRepository, BeanNameAware {
 		return null;
 	}
 
+	@Nullable
+	@Override
+	public JobInstance getJobInstance(String jobName, JobParameters jobParameters) {
+		return null;
+	}
+
 	@Nullable
 	@Override
 	public JobExecution getLastJobExecution(String jobName, JobParameters jobParameters) {

spring-batch-core/src/test/java/org/springframework/batch/core/explore/support/SimpleJobExplorerTests.java

@@ -19,6 +19,10 @@ package org.springframework.batch.core.explore.support;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -44,7 +48,7 @@ import org.springframework.batch.core.repository.dao.StepExecutionDao;
  * @author Will Schipp
  * @author Michael Minella
  * @author Mahmoud Ben Hassine
- *
+ * @author Parikshit Dutta
  */
 class SimpleJobExplorerTests {
 
@@ -150,6 +154,14 @@ class SimpleJobExplorerTests {
 		jobExplorer.getJobInstance(111L);
 	}
 
+	@Test
+	public void testGetJobInstanceWithNameAndParameters() throws Exception {
+		when(jobInstanceDao.getJobInstance("job", new JobParameters())).thenReturn(jobInstance);
+		JobInstance jobInstance = jobExplorer.getJobInstance("job", new JobParameters());
+		verify(jobInstanceDao).getJobInstance(anyString(), any(JobParameters.class));
+		assertEquals(jobInstance, jobInstance);
+	}
+
 	@Test
 	void testGetLastJobInstances() {
 		jobInstanceDao.getJobInstances("foo", 0, 1);

spring-batch-core/src/test/java/org/springframework/batch/core/launch/support/CommandLineJobRunnerTests.java

@@ -55,7 +55,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 /**
  * @author Lucas Ward
  * @author Mahmoud Ben Hassine
- *
+ * @author Parikshit Dutta
  */
 class CommandLineJobRunnerTests {
 
@@ -515,6 +515,12 @@ class CommandLineJobRunnerTests {
 			throw new UnsupportedOperationException();
 		}
 
+		@Nullable
+		@Override
+		public JobInstance getJobInstance(String jobName, JobParameters jobParameters) {
+			throw new UnsupportedOperationException();
+		}
+
 		@Nullable
 		@Override
 		public JobInstance getLastJobInstance(String jobName) {

spring-batch-core/src/test/java/org/springframework/batch/core/repository/support/SimpleJobRepositoryTests.java

@@ -21,6 +21,8 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -60,6 +62,7 @@ import org.springframework.batch.core.step.StepSupport;
  * @author Dimitrios Liapis
  * @author Baris Cubukcuoglu
  * @author Mahmoud Ben Hassine
+ * @author Parikshit Dutta
  *
  */
 class SimpleJobRepositoryTests {
@@ -329,4 +332,12 @@ class SimpleJobRepositoryTests {
 		assertEquals(BatchStatus.STOPPED, jobExecution.getStatus());
 	}
 
+
+	@Test
+	public void testGetJobInstanceWithNameAndParameters() throws Exception {
+		when(jobInstanceDao.getJobInstance("job", new JobParameters())).thenReturn(jobInstance);
+		JobInstance jobInstance = jobRepository.getJobInstance("job", new JobParameters());
+		verify(jobInstanceDao).getJobInstance(anyString(), any(JobParameters.class));
+		assertEquals(jobInstance, jobInstance);
+	}
 }

spring-batch-core/src/test/java/org/springframework/batch/core/step/JobRepositorySupport.java

@@ -28,7 +28,7 @@ import org.springframework.lang.Nullable;
  * @author Dave Syer
  * @author David Turanski
  * @author Mahmoud Ben Hassine
- *
+ * @author Parikshit Dutta
  */
 public class JobRepositorySupport implements JobRepository {
 
@@ -66,6 +66,12 @@ public class JobRepositorySupport implements JobRepository {
 	public void update(JobInstance job) {
 	}
 
+	@Nullable
+	@Override
+	public JobInstance getJobInstance(String jobName, JobParameters jobParameters) {
+		return null;
+	}
+
 	@Nullable
 	@Override
 	public StepExecution getLastStepExecution(JobInstance jobInstance, String stepName) {

spring-batch-core/src/test/java/org/springframework/batch/core/step/item/TaskletStepExceptionTests.java

@@ -62,7 +62,7 @@ import static org.springframework.batch.core.BatchStatus.UNKNOWN;
  * @author Dave Syer
  * @author David Turanski
  * @author Mahmoud Ben Hassine
- *
+ * @author Parikshit Dutta
  */
 class TaskletStepExceptionTests {
 
@@ -520,6 +520,12 @@ class TaskletStepExceptionTests {
 			return null;
 		}
 
+		@Nullable
+		@Override
+		public JobInstance getJobInstance(String jobName, JobParameters jobParameters) {
+			return null;
+		}
+
 		@Nullable
 		@Override
 		public StepExecution getLastStepExecution(JobInstance jobInstance, String stepName) {