Create and implement a CacheListener inside WifiNetworkScoreCache. (d76e65be) · Commits · e / os / android_frameworks_base

wifi/java/android/net/wifi/WifiNetworkScoreCache.java

+91 −11

Original line number	Diff line number	Diff line
		@@ -17,13 +17,19 @@
		package android.net.wifi;

		import android.Manifest.permission;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.annotation.SystemApi;
		import android.content.Context;
		import android.os.Handler;
		import android.net.INetworkScoreCache;
		import android.net.NetworkKey;
		import android.net.ScoredNetwork;
		import android.util.Log;

		import com.android.internal.util.Preconditions;
		import com.android.internal.annotations.GuardedBy;

		import java.io.FileDescriptor;
		import java.io.PrintWriter;
		import java.util.HashMap;
		@@ -43,22 +49,41 @@ public class WifiNetworkScoreCache extends INetworkScoreCache.Stub {
		// We treat the lowest possible score as though there were no score, effectively allowing the
		// scorer to provide an RSSI threshold below which a network should not be used.
		public static final int INVALID_NETWORK_SCORE = Byte.MIN_VALUE;

		// See {@link #CacheListener}.
		@Nullable
		@GuardedBy("mCacheLock")
		private CacheListener mListener;

		private final Context mContext;
		private final Object mCacheLock = new Object();

		// The key is of the form "<ssid>"<bssid>
		// TODO: What about SSIDs that can't be encoded as UTF-8?
		private final Map<String, ScoredNetwork> mNetworkCache;


		public WifiNetworkScoreCache(Context context) {
		mContext = context;
		this(context, null /* listener */);
		}

		/**
		* Instantiates a WifiNetworkScoreCache.
		*
		* @param context Application context
		* @param listener CacheListener for cache updates
		*/
		public WifiNetworkScoreCache(Context context, @Nullable CacheListener listener) {
		mContext = context.getApplicationContext();
		mListener = listener;
		mNetworkCache = new HashMap<String, ScoredNetwork>();
		}

		@Override public final void updateScores(List<ScoredNetwork> networks) {
		if (networks == null) {
		if (networks == null \|\| networks.isEmpty()) {
		return;
		}
		Log.e(TAG, "updateScores list size=" + networks.size());
		Log.d(TAG, "updateScores list size=" + networks.size());

		synchronized(mNetworkCache) {
		for (ScoredNetwork network : networks) {
		@@ -67,6 +92,12 @@ public class WifiNetworkScoreCache extends INetworkScoreCache.Stub {
		mNetworkCache.put(networkKey, network);
		}
		}

		synchronized (mCacheLock) {
		if (mListener != null) {
		mListener.post(networks);
		}
		}
		}

		@Override public final void clearScores() {
		@@ -193,4 +224,53 @@ public class WifiNetworkScoreCache extends INetworkScoreCache.Stub {
		}
		}

		/** Registers a CacheListener instance, replacing the previous listener if it existed. */
		public void registerListener(CacheListener listener) {
		synchronized (mCacheLock) {
		mListener = listener;
		}
		}

		/** Removes the registered CacheListener. */
		public void unregisterListener() {
		synchronized (mCacheLock) {
		mListener = null;
		}
		}

		/** Listener for updates to the cache inside WifiNetworkScoreCache. */
		public abstract static class CacheListener {

		private Handler mHandler;

		/**
		* Constructor for CacheListener.
		*
		* @param handler the Handler on which to invoke the {@link #networkCacheUpdated} method.
		* This cannot be null.
		*/
		public CacheListener(@NonNull Handler handler) {
		Preconditions.checkNotNull(handler);
		mHandler = handler;
		}

		/** Invokes the {@link #networkCacheUpdated(List<ScoredNetwork>)} method on the handler. */
		void post(List<ScoredNetwork> updatedNetworks) {
		mHandler.post(new Runnable() {
		@Override
		public void run() {
		networkCacheUpdated(updatedNetworks);
		}
		});
		}

		/**
		* Invoked whenever the cache is updated.
		*
		* <p>Clearing the cache does not invoke this method.
		*
		* @param updatedNetworks the networks that were updated
		*/
		public abstract void networkCacheUpdated(List<ScoredNetwork> updatedNetworks);
		}
		}

wifi/tests/src/android/net/wifi/WifiNetworkScoreCacheTest.java

+160 −112

Original line number	Diff line number	Diff line
		@@ -17,6 +17,8 @@
		package android.net.wifi;

		import static org.junit.Assert.*;
		import static org.mockito.Mockito.timeout;
		import static org.mockito.Mockito.verify;
		import static org.mockito.Mockito.when;

		import android.content.Context;
		@@ -24,6 +26,9 @@ import android.net.NetworkKey;
		import android.net.RssiCurve;
		import android.net.ScoredNetwork;
		import android.net.WifiKey;
		import android.net.wifi.WifiNetworkScoreCache.CacheListener;
		import android.os.Handler;
		import android.os.HandlerThread;
		import android.support.test.filters.SmallTest;
		import android.support.test.runner.AndroidJUnit4;

		@@ -33,17 +38,21 @@ import org.junit.Rule;
		import org.junit.Before;
		import org.junit.Test;
		import org.junit.runner.RunWith;
		import org.mockito.ArgumentCaptor;
		import org.mockito.Captor;
		import org.mockito.Mock;
		import org.mockito.MockitoAnnotations;

		import java.util.List;
		import java.util.concurrent.CountDownLatch;
		import java.util.concurrent.TimeUnit;


		/** Unit tests for {@link WifiNetworkScoreCache}. */
		@RunWith(AndroidJUnit4.class)
		@SmallTest
		public class WifiNetworkScoreCacheTest {

		@Mock public Context mockContext; // isn't used, can be null
		@Mock private RssiCurve mockRssiCurve;

		public static final String SSID = "ssid";
		public static final String FORMATTED_SSID = "\"" + SSID + "\"";
		public static final String BSSID = "AA:AA:AA:AA:AA:AA";
		@@ -52,6 +61,15 @@ public class WifiNetworkScoreCacheTest {

		public static final ScanResult VALID_SCAN_RESULT = buildScanResult(SSID, BSSID);

		@Mock private Context mockApplicationContext;
		@Mock private Context mockContext; // isn't used, can be null
		@Mock private RssiCurve mockRssiCurve;


		private CacheListener mCacheListener;
		private CountDownLatch mLatch;
		private Handler mHandler;
		private List<ScoredNetwork> mUpdatedNetworksCaptor;
		private ScoredNetwork mValidScoredNetwork;
		private WifiNetworkScoreCache mScoreCache =
		new WifiNetworkScoreCache(mockContext);
		@@ -80,9 +98,24 @@ public class WifiNetworkScoreCacheTest {
		@Before
		public void setUp() {
		MockitoAnnotations.initMocks(this);

		when(mockContext.getApplicationContext()).thenReturn(mockApplicationContext);

		mValidScoredNetwork = buildScoredNetwork(VALID_KEY, mockRssiCurve);
		mScoreCache = new WifiNetworkScoreCache(mockContext);
		initializeCacheWithValidScoredNetwork();

		HandlerThread thread = new HandlerThread("WifiNetworkScoreCacheTest Handler Thread");
		thread.start();
		mHandler = new Handler(thread.getLooper());
		mLatch = new CountDownLatch(1);
		mCacheListener = new CacheListener(mHandler) {
		@Override
		public void networkCacheUpdated(List<ScoredNetwork> updatedNetworks) {
		mUpdatedNetworksCaptor = updatedNetworks;
		mLatch.countDown();
		}
		};
		}


		@@ -148,9 +181,24 @@ public class WifiNetworkScoreCacheTest {
		@Test
		public void getMeteredHintShouldReturnTrue() {
		ScoredNetwork network =
		new ScoredNetwork(new NetworkKey(VALID_KEY), mockRssiCurve, true /* metered Hint */);
		new ScoredNetwork(
		new NetworkKey(VALID_KEY), mockRssiCurve, true /* metered Hint */);
		mScoreCache.updateScores(ImmutableList.of(network));

		assertTrue(mScoreCache.getMeteredHint(VALID_SCAN_RESULT));
		}

		@Test
		public void updateScoresShouldInvokeCacheListener_networkCacheUpdated() {
		mScoreCache = new WifiNetworkScoreCache(mockContext, mCacheListener);
		initializeCacheWithValidScoredNetwork();

		try {
		mLatch.await(1, TimeUnit.SECONDS); // wait for listener to be executed
		} catch (InterruptedException e) {
		fail("Interrupted Exception while waiting for listener to be invoked.");
		}
		assertEquals("One network should be updated", 1, mUpdatedNetworksCaptor.size());
		assertEquals(mValidScoredNetwork, mUpdatedNetworksCaptor.get(0));
		}
		}