X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=bundles%2Forg.simantics.application%2Fsrc%2Forg%2Fsimantics%2Fapplication%2Fdb%2FSocketUtils.java;fp=bundles%2Forg.simantics.application%2Fsrc%2Forg%2Fsimantics%2Fapplication%2Fdb%2FSocketUtils.java;h=331b5efc0294a955d49b2990b5fdf9aab2363e61;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.application/src/org/simantics/application/db/SocketUtils.java b/bundles/org.simantics.application/src/org/simantics/application/db/SocketUtils.java
new file mode 100644
index 000000000..331b5efc0
--- /dev/null
+++ b/bundles/org.simantics.application/src/org/simantics/application/db/SocketUtils.java
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.application.db;
+
+import java.net.BindException;
+import java.net.Socket;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class SocketUtils {
+
+    /**
+     * @return free ephemeral port for a TCP socket
+     */
+    public static int getFreeEphemeralPort() {
+        while (true) {
+            try {
+                Socket s = null;
+                try {
+                    s = new Socket();
+                    s.bind(null);
+                    return s.getLocalPort();
+                } finally {
+                    if (s != null)
+                        s.close();
+                }
+            } catch (BindException e) {
+                // Nothing to do, try next port
+            } catch (Throwable e) {
+                throw new Error(e);
+            }
+        }
+    }
+
+}