Java EE应用能否向Payara Server部署其他应用？

Absolutely! You can programmatically deploy additional applications to Payara Server, and Payara Micro makes this straightforward with its embedded API. The code snippet you referenced is a great starting point—here's a complete, working example along with clear explanations:

Working Code Example #

import fish.payara.micro.BootstrapException;
import fish.payara.micro.PayaraMicro;
import fish.payara.micro.PayaraMicroRuntime;
import java.io.File;

public class EmbeddedPayara {
    public static void main(String[] args) throws BootstrapException {
        // Point to a directory containing WAR files (or a single WAR file)
        File deploymentDir = new File("/home/user/deployments/");
        
        // Bootstrap Payara Micro and deploy all apps in the specified directory on startup
        PayaraMicroRuntime instance = PayaraMicro.bootstrap()
                .setDeploymentDir(deploymentDir)
                .start();
        
        // Optional: Deploy an additional app at runtime *after* the server is running
        File anotherWar = new File("/home/user/new-app.war");
        instance.deploy(anotherWar);
    }
}

Key Breakdown #

• Payara Micro API: The PayaraMicro class lets you spin up an embedded Payara instance, while PayaraMicroRuntime gives you control over the running server—including on-demand app deployment.
• Deployment Flexibility:
  • Use setDeploymentDir() to deploy multiple apps in one go when starting the server.
  • Use deploy(File) on the runtime instance to add new applications at any time after the server is live.
• Dependencies: To use this, add the Payara Micro dependency to your project. For Maven, include this in your pom.xml:

  <dependency>
      <groupId>fish.payara.extras</groupId>
      <artifactId>payara-micro</artifactId>
      <version>6.2024.6</version> <!-- Use the latest stable version -->
      <scope>provided</scope>
  </dependency>
  

Additional Options for Full Payara Server #

If you're working with a full (non-Micro) Payara Server instance, you can also deploy apps programmatically using:

• The Admin REST API: Call server endpoints to deploy/undeploy apps from your Java code.
• The asadmin command-line tool: Execute deployment commands via ProcessBuilder in your application.

内容的提问来源于stack exchange，提问作者František Jeřábek