Created the Server.java entity

src/main/java/de/gnmyt/mcdash/entities/Server.java

@@ -0,0 +1,108 @@
+package de.gnmyt.mcdash.entities;
+
+import de.gnmyt.mcdash.api.Logger;
+
+import java.io.File;
+
+public class Server {
+
+    private final Logger LOG = new Logger(Server.class);
+
+    private Thread keepAliveThread;
+    private final String name;
+    private ServerStatus status;
+    private final ServerConfiguration configuration;
+    private Process process;
+
+    /**
+     * Basic constructor of the server
+     *
+     * @param name              The name of the server
+     * @param status            The status of the server
+     * @param configurationFile The configuration file of the server
+     */
+    public Server(String name, ServerStatus status, File configurationFile) {
+        this.name = name;
+        this.status = status;
+        this.configuration = ServerConfiguration.load(configurationFile);
+    }
+
+    /**
+     * Gets the name of the server
+     *
+     * @return the name of the server
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Gets the status of the server
+     *
+     * @return the status of the server. Represented by the {@link ServerStatus} enum
+     */
+    public ServerStatus getStatus() {
+        return status;
+    }
+
+    /**
+     * Gets the process of the server
+     *
+     * @return the process of the server
+     */
+    public Process getProcess() {
+        return process;
+    }
+
+    /**
+     * Gets the configuration of the server
+     *
+     * @return the configuration of the server
+     */
+    public ServerConfiguration getConfiguration() {
+        return configuration;
+    }
+
+    /**
+     * Sets the process of the server
+     *
+     * @param process the process of the server
+     */
+    public void setProcess(Process process) {
+        this.process = process;
+
+        if (process == null && keepAliveThread != null) {
+            keepAliveThread.interrupt();
+            keepAliveThread = null;
+        }
+    }
+
+    /**
+     * Sets the status of the server
+     *
+     * @param status the status of the server
+     */
+    public void setStatus(ServerStatus status) {
+        this.status = status;
+    }
+
+    /**
+     * Starts the "keep alive" thread
+     * This thread will check if the server is still running and will set the status to offline if the server stopped
+     */
+    public void keepAlive() {
+        keepAliveThread = new Thread(() -> {
+            try {
+                process.waitFor();
+            } catch (InterruptedException e) {
+                LOG.error("An error occurred while waiting for the server to stop", e);
+            }
+            setStatus(ServerStatus.OFFLINE);
+            setProcess(null);
+            LOG.info("Process of server {} stopped", name);
+        });
+        keepAliveThread.setName("ServerKeepAliveThread-" + name);
+        keepAliveThread.start();
+    }
+
+}