support listArchives with sessionId, fixes #122 (#132)

* [#122] listArchives with sessionId now supported

* [#122] Fixed indentation / code formatting

Author: kayhuba

src/main/java/com/opentok/OpenTok.java

@@ -340,6 +340,23 @@ public ArchiveList listArchives(int offset, int count) throws OpenTokException {
         }
     }
 
+    /***
+     * Returns a List of {@link Archive} objects, representing archives that are both both completed and in-progress,
+     * for your API key.
+     *
+     * @param sessionId
+     *            The sessionId for which archives should be retrieved.
+     * @return A List of {@link Archive} objects.
+     */
+    public ArchiveList listArchives(String sessionId) throws RequestException {
+        String archives = this.client.getArchives(sessionId);
+        try {
+            return archiveListReader.readValue(archives);
+        } catch (Exception e) {
+            throw new RequestException("Exception mapping json: " + e.getMessage());
+        }
+    }
+
     /**
      * Starts archiving an OpenTok session. This version of the <code>startArchive()</code> method
      * lets you disable audio or video recording.

src/main/java/com/opentok/util/HttpClient.java

@@ -133,6 +133,28 @@ public String getArchives(int offset, int count) throws RequestException {
         return responseString;
     }
 
+    public String getArchives(String sessionId) throws RequestException {
+        String url = this.apiUrl + "/v2/project/" + this.apiKey + "/archive?sessionId=" + sessionId;
+
+        Future<Response> request = this.prepareGet(url).execute();
+        try {
+            Response response = request.get();
+            switch (response.getStatusCode()) {
+                case 200:
+                    return response.getResponseBody();
+                case 403:
+                    throw new RequestException("Could not get OpenTok Archives. The request was not authorized.");
+                case 500:
+                    throw new RequestException("Could not get OpenTok Archives. A server error occurred.");
+                default:
+                    throw new RequestException("Could not get an OpenTok Archive. The server response was invalid."
+                            + " response code: " + response.getStatusCode());
+            }
+        } catch (InterruptedException | ExecutionException | IOException e) {
+            throw new RequestException("Could not get OpenTok Archives", e);
+        }
+    }
+
     public String startArchive(String sessionId, ArchiveProperties properties)
             throws OpenTokException {
         String responseString = null;