1 files changed, 118 insertions, 0 deletions
diff --git a/core/modules/qemu/runvirt-plugin-qemu/src/main/java/org/openslx/runvirt/viewer/Viewer.java b/core/modules/qemu/runvirt-plugin-qemu/src/main/java/org/openslx/runvirt/viewer/Viewer.java
new file mode 100644
index 00000000..d23a9e11
--- /dev/null
+++ b/core/modules/qemu/runvirt-plugin-qemu/src/main/java/org/openslx/runvirt/viewer/Viewer.java
@@ -0,0 +1,118 @@
+package org.openslx.runvirt.viewer;
+
+import org.openslx.runvirt.virtualization.LibvirtHypervisor;
+import org.openslx.runvirt.virtualization.LibvirtVirtualMachine;
+import org.openslx.virtualization.Version;
+
+/**
+ * Representation of an viewer for virtual machines running on a host system.
+ * 
+ * @author Manuel Bentele
+ * @version 1.0
+ */
+public abstract class Viewer
+{
+	/**
+	 * Name of the viewer.
+	 */
+	private final String name;
+
+	/**
+	 * Number of supported displays by the viewer.
+	 */
+	private final int numSupportedDisplays;
+
+	/**
+	 * The virtual machine to display.
+	 */
+	private final LibvirtVirtualMachine machine;
+
+	/**
+	 * Remote (hypervisor) endpoint for the viewer to connect to.
+	 */
+	private final LibvirtHypervisor hypervisor;
+
+	/**
+	 * Creates a new viewer for a Libvirt virtual machine running on a Libvirt hypervisor.
+	 * 
+	 * @param name textual name of the viewer.
+	 * @param numSupportedDisplays number of supported displays by the viewer.
+	 * @param machine virtual machine to display.
+	 * @param hypervisor remote (hypervisor) endpoint for the viewer to connect to.
+	 */
+	public Viewer( String name, int numSupportedDisplays, LibvirtVirtualMachine machine, LibvirtHypervisor hypervisor )
+	{
+		this.name = name;
+		this.numSupportedDisplays = numSupportedDisplays;
+		this.machine = machine;
+		this.hypervisor = hypervisor;
+	}
+
+	/**
+	 * Returns the name of the viewer.
+	 * 
+	 * @return name of the viewer.
+	 */
+	public String getName()
+	{
+		return this.name;
+	}
+
+	/**
+	 * Returns the number of supported displays by the viewer.
+	 * 
+	 * @return number of supported displays by the viewer.
+	 */
+	public int getNumberOfSupportedDisplays()
+	{
+		return this.numSupportedDisplays;
+	}
+
+	/**
+	 * Returns the virtual machine to display.
+	 * 
+	 * @return virtual machine to display.
+	 */
+	public LibvirtVirtualMachine getMachine()
+	{
+		return this.machine;
+	}
+
+	/**
+	 * Returns the remote (hypervisor) endpoint for the viewer to connect to.
+	 * 
+	 * @return remote (hypervisor) endpoint for the viewer to connect to.
+	 */
+	public LibvirtHypervisor getHypervisor()
+	{
+		return this.hypervisor;
+	}
+
+	/**
+	 * Displays all virtual machine's displays.
+	 * 
+	 * @throws ViewerException failed to display all displays of a virtual machine.
+	 * 
+	 * @apiNote A call to this method blocks until the implemented {@link #render()} process
+	 *          terminates.
+	 */
+	public void display() throws ViewerException
+	{
+		this.render();
+	}
+
+	/**
+	 * Returns the version of the viewer.
+	 * 
+	 * @return version of the viewer.
+	 * @throws ViewerException failed to get version of the viewer.
+	 */
+	public abstract Version getVersion() throws ViewerException;
+
+	/**
+	 * Renders the content of all displays from the virtual machine.
+	 * 
+	 * @throws ViewerException failed to render all displays of a virtual machine.
+	 */
+	protected abstract void render() throws ViewerException;
+}