How to debug and test the JAVA class library based on the JSR 352 API
How to debug and test the Java class library based on the JSR 352 API
Introduction:
The Java specification request 352 (JSR 352) is a batch API specification in the Javaee standard. It provides an interface for developing and running a large -scale and long -term batch processing application.When developing the JSR 352 API -based Java library, debugging and testing are very important. This article will introduce how to debug and test.
Debug the Java class library based on the JSR 352 API:
1. Use an integrated development environment (IDE):
Ide (such as Eclipse, Intellij IDEA, etc.) supporting Javaee development can easily debug the Java class library based on the JSR 352 API.First, guide the Java library into the IDE and set up project dependence.Then, by starting the debugging configuration of the application application, the code can be performed in the debug mode.In the debug mode, you can set a breakpoint, execute code by line, and observe the value of the variable.These functions help quickly locate and solve problems in the code.
2. Use log records:
The JSR 352 API provides some log recorder interfaces (such as javax.batch.operations.loggers), which can be used to record the application log in the application.You can enable the corresponding log level when running batch processing applications, and the logging record -oriented console or log file.By analyzing the log, you can track the execution process of the code and find potential problems.For example, you can use the following code to set the log level and record the log:
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.batch.operations.JobOperator;
import javax.batch.runtime.BatchRuntime;
public class BatchApplication {
private static final Logger LOGGER = Logger.getLogger(BatchApplication.class.getName());
public static void main(String[] args) {
Logger.setLevel (level.all); // Set the log level
Logger.info ("Application start");
JobOperator jobOperator = BatchRuntime.getJobOperator();
// Execute batch processing tasks
Logger.info ("Application End");
}
}
3. Use unit test:
It is very helpful to test the JAVA -class libraries based on the JSR 352 API, which can ensure the correctness of the code and provide fast feedback.You can use the Java unit testing framework (such as Junit, Testng, etc.) to write test cases and simulate the execution of the batch environment, operation and steps.For example, you can use the following code fragment to write a simple Junit test case:
import javax.batch.runtime.BatchRuntime;
import javax.batch.runtime.BatchStatus;
import javax.batch.runtime.JobExecution;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class BatchApplicationTest {
@Test
public void testBatchApplication() throws Exception {
JobExecution jobExecution = BatchRuntime.getJobOperator().start("myJob", null);
BatchStatus batchStatus = jobExecution.getBatchStatus();
assertEquals(BatchStatus.COMPLETED, batchStatus);
}
}
Using these test cases, you can verify different aspects of batch applications, such as the status of the job and the execution results of the steps.
in conclusion:
Debugging and testing is an indispensable part of the Java class library based on the JSR 352 API.Using the integrated development environment, log records and unit testing can help developers quickly position and solve problems, and improve the reliability and performance of the code.
