implements okhttp response caching

vtm-tests/test/org/oscim/tiling/source/OkHttpEngineTest.java

@@ -3,6 +3,7 @@
 import static org.fest.assertions.api.Assertions.assertThat;
 
 import java.io.BufferedReader;
+import java.io.File;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 
@@ -12,6 +13,7 @@
 import org.oscim.core.Tile;
 import org.oscim.tiling.source.oscimap4.OSciMap4TileSource;
 
+import com.squareup.okhttp.HttpResponseCache;
 import com.squareup.okhttp.mockwebserver.MockResponse;
 import com.squareup.okhttp.mockwebserver.MockWebServer;
 import com.squareup.okhttp.mockwebserver.RecordedRequest;
@@ -20,6 +22,7 @@ public class OkHttpEngineTest {
 	private OkHttpEngine engine;
 	private MockWebServer server;
 	private MockResponse mockResponse;
+	private HttpResponseCache cache;
 
 	@Before
 	public void setUp() throws Exception {
@@ -87,4 +90,16 @@ public void requestCompleted_shouldReturnValueGiven() throws Exception {
 		assertThat(engine.requestCompleted(true)).isTrue();
 		assertThat(engine.requestCompleted(false)).isFalse();
 	}
+
+	@Test
+	public void create_shouldUseTileSourceCache() throws Exception {
+		cache = new HttpResponseCache(new File("tmp"), 1024);
+		OSciMap4TileSource tileSource =
+				new OSciMap4TileSource(server.getUrl("/tiles/vtm").toString());
+		tileSource.setResponseCache(cache);
+		engine = (OkHttpEngine) new OkHttpEngine.OkHttpFactory().create(tileSource);
+		engine.sendRequest(new Tile(1, 2, new Integer(3).byteValue()));
+		engine.requestCompleted(true);
+		assertThat(cache.getRequestCount()).isEqualTo(1);
+	}
 }

vtm/src/org/oscim/tiling/source/OkHttpEngine.java

@@ -26,12 +26,15 @@
 
 import org.oscim.core.Tile;
 import org.oscim.utils.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import com.squareup.okhttp.OkHttpClient;
 
 public class OkHttpEngine implements HttpEngine {
 	private final OkHttpClient mClient;
 	private final UrlTileSource mTileSource;
+	static final Logger log = LoggerFactory.getLogger(OkHttpEngine.class);
 
 	public static class OkHttpFactory implements HttpEngine.Factory {
 		private final OkHttpClient mClient;
@@ -50,6 +53,7 @@ public HttpEngine create(UrlTileSource tileSource) {
 
 	public OkHttpEngine(OkHttpClient client, UrlTileSource tileSource) {
 		mClient = client;
+		mClient.setResponseCache(tileSource.getResponseCache());
 		mTileSource = tileSource;
 	}
 
@@ -89,7 +93,7 @@ public void run() {
 
 	@Override
 	public void setCache(OutputStream os) {
-		// TODO: Evaluate OkHttp response cache and determine if additional caching is required.
+		// OkHttp cache implented through tileSource setResponseCache
 	}
 
 	@Override

vtm/src/org/oscim/tiling/source/UrlTileSource.java

@@ -16,6 +16,8 @@
  */
 package org.oscim.tiling.source;
 
+import com.squareup.okhttp.HttpResponseCache;
+
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Collections;
@@ -31,6 +33,7 @@ public abstract class UrlTileSource extends TileSource {
 	private final URL mUrl;
 	private final String[] mTilePath;
 
+	private HttpResponseCache mResponseCache;
 	private HttpEngine.Factory mHttpFactory;
 	private Map<String, String> mRequestHeaders = Collections.emptyMap();
 	private TileUrlFormatter mTileUrlFormatter = URL_FORMATTER;
@@ -87,6 +90,14 @@ public void setHttpEngine(HttpEngine.Factory httpFactory) {
 		mHttpFactory = httpFactory;
 	}
 
+	public void setResponseCache(HttpResponseCache responseCache) {
+		mResponseCache = responseCache;
+	}
+
+	public HttpResponseCache getResponseCache() {
+		return mResponseCache;
+	}
+
 	public void setHttpRequestHeaders(Map<String, String> options) {
 		mRequestHeaders = options;
 	}