#36 /_ping implemented + puzzle

src/main/java/com/amihaiemil/docker/LocalDocker.java

@@ -26,6 +26,7 @@
 package com.amihaiemil.docker;
 
 import java.io.File;
+import java.net.URI;
 
 /**
  * Local Docker API. Use this when you want to communicate with the local
@@ -57,7 +58,10 @@ public LocalDocker(final File unixSocket){
      * @param version API version (e.g. v1.30).
      */
     public LocalDocker(final File unixSocket, final String version){
-        super(new UnixHttpClient(unixSocket));
+        super(
+            new UnixHttpClient(unixSocket),
+            URI.create("unix://localhost:80/" + version)
+        );
     }
 
 }

src/main/java/com/amihaiemil/docker/RtDocker.java

@@ -25,9 +25,12 @@
  */
 package com.amihaiemil.docker;
 
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
 import org.apache.http.client.HttpClient;
-
+import org.apache.http.client.methods.HttpGet;
 import java.io.IOException;
+import java.net.URI;
 
 /**
  * Restful Docker.
@@ -36,9 +39,6 @@
  * @since 0.0.1
  * @todo #11:30min Implement RemoteDocker which will make the requests over
  *  a tcp socket and TLS if certificates are provided.
- * @todo #32:30min Reimplement ping() with the new HttpClient architecture.
- *  It should create an HttpGet method and send it with the encapsulated
- *  client.
  */
 abstract class RtDocker implements Docker {
 
@@ -47,17 +47,27 @@ abstract class RtDocker implements Docker {
      */
     private final HttpClient client;
 
+    /**
+     * Base URI..
+     */
+    private final URI baseUri;
+
     /**
      * Ctor.
      * @param client Given HTTP Client.
+     * @param baseUri Base URI.
      */
-    RtDocker(final HttpClient client) {
+    RtDocker(final HttpClient client, final URI baseUri) {
         this.client = client;
+        this.baseUri = baseUri;
     }
 
     @Override
     public final boolean ping() throws IOException {
-        return true;
+        final HttpResponse response = this.client.execute(
+            new HttpGet(this.baseUri.toString() + "/_ping")
+        );
+        return response.getStatusLine().getStatusCode() == HttpStatus.SC_OK;
     }
 
     @Override

src/test/java/com/amihaiemil/docker/LocalDockerTestCase.java

@@ -36,28 +36,24 @@
  * @author Mihai Andronache (amihaiemil@gmail.com)
  * @version $Id$
  * @since 0.0.1
+ * @todo #39:1h Implement a unix socket server so we can also unit
+ *  test the calls made with UnixHttpClient. The user should be able
+ *  to specify what response it expected with each request to a certain
+ *  path.
  */
 public final class LocalDockerTestCase {
 
     /**
-     * LocalDocker can be instantiated with the unix:// scheme.
+     * LocalDocker can be instantiated.
      */
     @Test
-    public void canInstantiateWithScheme() {
-        final Docker docker = new LocalDocker(
-            new File("/var/run/docker.sock")
+    public void canBeInstantiate() {
+        MatcherAssert.assertThat(
+            new LocalDocker(
+                new File("/var/run/docker.sock")
+            ),
+            Matchers.notNullValue()
         );
-        MatcherAssert.assertThat(docker, Matchers.notNullValue());
     }
 
-    /**
-     * LocalDocker can be instantiated without the unix:// scheme.
-     */
-    @Test
-    public void canInstantiateWithoutScheme() {
-        final Docker docker = new LocalDocker(
-            new File("/var/run/docker.sock")
-        );
-        MatcherAssert.assertThat(docker, Matchers.notNullValue());
-    }
 }