Documentation for GlassFish

Signed-off-by: David Matějček <david.matejcek@omnifish.ee>

Author: dmatej

glassfish/README-short.txt

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+Eclipse GlassFish is a Jakarta EE Full Profile compatible implementation.
+

glassfish/content.md

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+# What is GlassFish?
+
+[Eclipse GlassFish](https://projects.eclipse.org/projects/ee4j.glassfish) is a Jakarta EE compatible implementation sponsored by the Eclipse Foundation.
+
+%%LOGO%%
+
+# How to use this image
+
+## Usual Start
+
+```bash
+docker run -d glassfish
+```
+
+Let's try something more complicated:
+
+-	`-d` starts the container as a daemon, so the shell doesn't print logs and finishes.
+-	`AS_STOP_TIMEOUT=60000` configures the asadmin stop-domain timeout in millis. If it is exceeded, stop-domain can kill the JVM.
+-	`AS_TRACE=true` enables tracing of the GlassFish startup. It is useful when the server doesn't start without any useful logs.
+-	`--user 1000` configures explicit user id for the container. It can be useful for K8S containers.
+-	`glassfish asadmin start-domain --verbose --debug=true` replaces default startup command with another.
+-	Docker then returns the container id which you can use for further commands.
+
+```bash
+docker run -d -e AS_STOP_TIMEOUT=600000 -e AS_TRACE=true --user 1000 glassfish asadmin start-domain --verbose --debug=true
+5a11f2fe1a9dd1569974de913a181847aa22165b5015ab20b271b08a27426e72
+
+docker logs 5a11f2fe1a9dd1569974de913a181847aa22165b5015ab20b271b08a27426e72
+...
+
+docker stop 5a11f2fe1a9dd1569974de913a181847aa22165b5015ab20b271b08a27426e72
+```
+
+## TestContainers
+
+This is probably the simplest possible test with [GlassFish](https://glassfish.org/) and [TestContainers](https://www.testcontainers.org/). It automatically starts the GlassFish Docker Container and then stops it after the test. The test here is quite trivial - downloads the welcome page and verifies if it contains expected phrases.
+
+If you want to run more complicated tests, the good path is to
+
+1.	Write a singleton managing the GlassFish Docker Container or the whole test environment.
+2.	Write your own Junit5 extension which would start the container before your test and ensure that everything stops after the test including failures.
+3.	You can also implement direct access to the virtual network, containers, so you can change the environment configuration in between tests and simulate network failures, etc.
+
+```java
+@Testcontainers
+public class WelcomePageITest {
+
+    @Container
+    private final GenericContainer server = new GenericContainer<>("glassfish:7.0.3").withExposedPorts(8080);
+
+    @Test
+    void getRoot() throws Exception {
+          URL url = new URL("http://localhost:" + server.getMappedPort(8080) + "/");
+          StringBuilder content = new StringBuilder();
+          HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+          try {
+              connection.setRequestMethod("GET");
+              try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+                  String inputLine;
+                  while ((inputLine = in.readLine()) != null) {
+                      content.append(inputLine);
+                  }
+              }
+          } finally {
+              connection.disconnect();
+          }
+          assertThat(content.toString(), stringContainsInOrder("Eclipse GlassFish", "index.html", "production-quality"));
+      }
+
+}
+```

glassfish/github-repo

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+https://github.com/OmniFish-EE/docker-library-glassfish