Add ping method

vjuranek · vjuranek · commit 779204b6ac9e · 2014-07-24T22:09:38.000+02:00
diff --git a/src/main/java/com/github/dockerjava/client/DockerClient.java b/src/main/java/com/github/dockerjava/client/DockerClient.java
@@ -34,6 +34,7 @@
 import com.github.dockerjava.client.command.ListContainersCmd;
 import com.github.dockerjava.client.command.ListImagesCmd;
 import com.github.dockerjava.client.command.LogContainerCmd;
+import com.github.dockerjava.client.command.PingCmd;
 import com.github.dockerjava.client.command.PullImageCmd;
 import com.github.dockerjava.client.command.PushImageCmd;
 import com.github.dockerjava.client.command.RemoveContainerCmd;
@@ -174,6 +175,10 @@ public AuthCmd authCmd() {
 	public InfoCmd infoCmd() throws DockerException {
 		return new InfoCmd().withBaseResource(baseResource);
 	}
+	
+	public PingCmd pingCmd() {
+	    return new PingCmd().withBaseResource(baseResource);
+	}
 
 	public VersionCmd versionCmd() throws DockerException {
 		return new VersionCmd().withBaseResource(baseResource);
diff --git a/src/main/java/com/github/dockerjava/client/command/PingCmd.java b/src/main/java/com/github/dockerjava/client/command/PingCmd.java
@@ -0,0 +1,29 @@
+package com.github.dockerjava.client.command;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.sun.jersey.api.client.ClientResponse;
+import com.sun.jersey.api.client.UniformInterfaceException;
+import com.sun.jersey.api.client.WebResource;
+
+/**
+ * Ping the Docker server
+ * 
+ */
+public class PingCmd extends AbstrDockerCmd<PingCmd, Integer> {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(PingCmd.class);
+    
+    protected Integer impl() {
+        WebResource webResource = baseResource.path("/_ping");
+
+        try {
+            LOGGER.trace("GET: {}", webResource);
+            ClientResponse resp = webResource.get(ClientResponse.class);
+            return resp.getStatus();
+        } catch (UniformInterfaceException exception) {
+            return exception.getResponse().getStatus();
+        }
+    }
+}
