SONAR-4898 - Moved NetworkUtils to sonar-process

2 files changed, 98 insertions, 0 deletions

diff --git a/server/sonar-process/src/main/java/org/sonar/process/NetworkUtils.java b/server/sonar-process/src/main/java/org/sonar/process/NetworkUtils.java
new file mode 100644
index 00000000000..a037ce0113a
--- /dev/null
+++ b/server/sonar-process/src/main/java/org/sonar/process/NetworkUtils.java
@@ -0,0 +1,37 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2014 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.process;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+public class NetworkUtils {
+
+  public static int freePort() {
+    try {
+      ServerSocket s = new ServerSocket(0);
+      int port = s.getLocalPort();
+      s.close();
+      return port;
+    } catch (IOException e) {
+      throw new IllegalStateException("Can not find an open network port", e);
+    }
+  }
+}
diff --git a/server/sonar-process/src/test/java/org/sonar/process/NetworkUtilsTest.java b/server/sonar-process/src/test/java/org/sonar/process/NetworkUtilsTest.java
new file mode 100644
index 00000000000..09f6a597209
--- /dev/null
+++ b/server/sonar-process/src/test/java/org/sonar/process/NetworkUtilsTest.java
@@ -0,0 +1,61 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2014 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.process;
+
+import org.junit.Test;
+
+import java.net.ServerSocket;
+
+import static org.fest.assertions.Assertions.assertThat;
+
+public class NetworkUtilsTest {
+
+
+  @Test
+  public void find_free_port() throws Exception {
+    int port = NetworkUtils.freePort();
+    assertThat(port).isGreaterThan(1024);
+  }
+
+  @Test
+  public void find_multiple_free_port() throws Exception {
+    int port1 = NetworkUtils.freePort();
+    int port2 = NetworkUtils.freePort();
+
+    assertThat(port1).isGreaterThan(1024);
+    assertThat(port2).isGreaterThan(1024);
+
+    assertThat(port1).isNotSameAs(port2);
+  }
+
+  @Test
+  public void find_multiple_free_non_adjacent_port() throws Exception {
+    int port1 = NetworkUtils.freePort();
+
+    ServerSocket socket = new ServerSocket(port1 + 1);
+
+    int port2 = NetworkUtils.freePort();
+
+    assertThat(port1).isGreaterThan(1024);
+    assertThat(port2).isGreaterThan(1024);
+
+    assertThat(port1).isNotSameAs(port2);
+  }
+}
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