execute_java_report

Instructions

Execute a Java unit test to generate a trade surveillance report.

This tool runs the unit test for the specified Java class with the given 
config file to generate the required report or data extract. Running tests
ensures the report generation is validated during execution.

Args:
    java_class: The fully qualified Java class name (e.g., "com.trade.SettlementReportGenerator")
    config_file: Path to the SQL config file to use
    output_directory: Directory where the report should be saved
    
Returns:
    A dictionary containing execution status, report path, and any errors

Implementation Reference

• trade_surveillance_mcp/server.py:281-437 (handler)

  Handler function for execute_java_report tool. Decorated with @mcp.tool() for registration. Executes Java unit tests (Maven/Gradle/JUnit) to generate reports using provided Java class, SQL config, and output dir. Handles env vars, subprocess, verifies output file.

  @mcp.tool()
  async def execute_java_report(
      java_class: str,
      config_file: str,
      output_directory: str = "./reports"
  ) -> dict[str, Any]:
      """
      Execute a Java unit test to generate a trade surveillance report.
      
      This tool runs the unit test for the specified Java class with the given 
      config file to generate the required report or data extract. Running tests
      ensures the report generation is validated during execution.
      
      Args:
          java_class: The fully qualified Java class name (e.g., "com.trade.SettlementReportGenerator")
          config_file: Path to the SQL config file to use
          output_directory: Directory where the report should be saved
          
      Returns:
          A dictionary containing execution status, report path, and any errors
      """
      import subprocess
      import os
      from datetime import datetime
      from pathlib import Path
      
      start_time = datetime.now()
      
      # Derive test class name (e.g., SettlementReportGenerator -> SettlementReportGeneratorTest)
      class_simple_name = java_class.split('.')[-1]
      test_class_name = f"{class_simple_name}Test"
      
      # Get the package path from the java_class
      if '.' in java_class:
          package_parts = java_class.rsplit('.', 1)[0]
          test_class_full = f"{package_parts}.{test_class_name}"
      else:
          test_class_full = test_class_name
      
      # Create output directory if it doesn't exist
      output_path = Path(output_directory)
      output_path.mkdir(parents=True, exist_ok=True)
      
      # Generate report filename based on config and timestamp
      config_name = Path(config_file).stem
      timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
      report_filename = f"{config_name}_report_{timestamp}.csv"
      report_path = output_path / report_filename
      
      result = {
          "status": "running",
          "java_class": java_class,
          "test_class": test_class_full,
          "config_file": config_file,
          "output_directory": str(output_directory),
          "report_path": str(report_path),
          "execution_time": None,
          "errors": [],
          "test_output": None
      }
      
      try:
          logger.info(f"Executing Java test: {test_class_full} for class: {java_class}")
          
          # Set environment variables for the test to use
          env = os.environ.copy()
          env['CONFIG_FILE'] = str(Path(config_file).absolute())
          env['OUTPUT_FILE'] = str(report_path.absolute())
          
          # Determine build tool (Maven or Gradle)
          project_root = Path.cwd()
          has_maven = (project_root / "pom.xml").exists()
          has_gradle = (project_root / "build.gradle").exists() or (project_root / "build.gradle.kts").exists()
          
          if has_maven:
              # Run Maven test for specific test class
              cmd = [
                  "mvn",
                  "test",
                  f"-Dtest={test_class_name}",
                  f"-DconfigFile={config_file}",
                  f"-DoutputFile={report_path}"
              ]
              logger.info(f"Running Maven command: {' '.join(cmd)}")
          elif has_gradle:
              # Run Gradle test for specific test class
              cmd = [
                  "./gradlew",
                  "test",
                  f"--tests {test_class_name}",
                  f"-DconfigFile={config_file}",
                  f"-DoutputFile={report_path}"
              ]
              logger.info(f"Running Gradle command: {' '.join(cmd)}")
          else:
              # Fallback to direct JUnit execution
              cmd = [
                  "java",
                  "-cp",
                  "target/test-classes:target/classes:lib/*",  # Adjust classpath as needed
                  "org.junit.runner.JUnitCore",
                  test_class_full
              ]
              logger.info(f"Running JUnit command: {' '.join(cmd)}")
          
          # Execute the test
          process = await asyncio.create_subprocess_exec(
              *cmd,
              stdout=asyncio.subprocess.PIPE,
              stderr=asyncio.subprocess.PIPE,
              env=env,
              cwd=str(project_root)
          )
          
          stdout, stderr = await process.communicate()
          
          # Calculate execution time
          execution_time = (datetime.now() - start_time).total_seconds()
          result["execution_time"] = f"{execution_time:.2f}s"
          
          # Process output
          stdout_text = stdout.decode('utf-8') if stdout else ""
          stderr_text = stderr.decode('utf-8') if stderr else ""
          
          result["test_output"] = stdout_text
          
          if process.returncode == 0:
              result["status"] = "success"
              logger.info(f"Test execution completed successfully in {execution_time:.2f}s")
              
              # Verify report was created
              if report_path.exists():
                  file_size = report_path.stat().st_size
                  result["report_size"] = f"{file_size} bytes"
                  logger.info(f"Report generated: {report_path} ({file_size} bytes)")
              else:
                  result["status"] = "completed_no_output"
                  result["errors"].append("Test passed but report file was not created")
                  logger.warning("Test passed but no report file found")
          else:
              result["status"] = "failed"
              result["errors"].append(f"Test execution failed with exit code {process.returncode}")
              if stderr_text:
                  result["errors"].append(stderr_text)
              logger.error(f"Test execution failed: {stderr_text}")
          
      except FileNotFoundError as e:
          result["status"] = "error"
          result["errors"].append(f"Build tool not found: {str(e)}")
          result["errors"].append("Ensure Maven (mvn) or Gradle (./gradlew) is installed and in PATH")
          logger.error(f"Build tool not found: {e}")
      except Exception as e:
          result["status"] = "error"
          result["errors"].append(f"Unexpected error: {str(e)}")
          logger.error(f"Unexpected error during test execution: {e}", exc_info=True)
      
      return result