close some url connections and streams. add connectivity change to te… (#133)

* close some url connections and streams. add connectivity change to test-app manifest.  add a few more exception handlers.

* changed reschedulers to wake on wifi state change : connecting

* fixup docs and cleanup

* cleanup from mike's comments

* update changelog

Author: thomaszurkan-optimizely

CHANGELOG.md

@@ -1,4 +1,27 @@
 # Optimizely Android X SDK Changelog
+### 1.4.0-alpha-RC1
+July 26, 2017
+
+- Release candidate for 1.4.0
+
+*Bug Fixes*
+
+- Better javadocs.
+- Cleanup any resource leaks.
+- Better exception handling to avoid any crashes.
+- Fix proguard rules
+- Fix logger issue
+- Allow EventRescheduler to work with wifi change intent filter (you don't have to include that intent filter).
+
+*Breaking Changes*
+
+- Must include intent filter for EventRescheduler and DatafileRescheduler in the application manifest if the developer wants to use them (see the test-app manifest for an example).
+- Pass context into OptimizelyManager.Builder.
+- UserProfileService added.
+- Background processes are not running by default.
+- Various handlers (EventHandler, DatafileHandler, ErrorHandler) can be overridden.
+
+
 ### 1.4.0-alpha
 July 11, 2017
 

android-sdk/src/main/java/com/optimizely/ab/android/sdk/OptimizelyClient.java

@@ -47,7 +47,7 @@ public class OptimizelyClient {
     private final Logger logger;
 
     @Nullable private Optimizely optimizely;
-    @Nullable private Map<String, String> defaultAttributes;
+    @NonNull private Map<String, String> defaultAttributes;
 
     OptimizelyClient(@Nullable Optimizely optimizely, @NonNull Logger logger) {
         this.optimizely = optimizely;
@@ -86,7 +86,7 @@ protected void setDefaultAttributes(@NonNull Map<String, String> attrs) {
      * @return a new map of both the default attributes and attributes passed in.
      */
     private Map<String, String> getAllAttributes(@NonNull Map<String, String> attrs) {
-        Map<String,String> combinedMap = new HashMap<String,String>(defaultAttributes);
+        Map<String,String> combinedMap = new HashMap<>(defaultAttributes);
 
         // this essentially overrides defaultAttributes if the attrs passed in have the same key.
         combinedMap.putAll(attrs);

android-sdk/src/main/java/com/optimizely/ab/android/sdk/OptimizelyDefaultAttributes.java

@@ -70,7 +70,7 @@ static Map<String, String> buildDefaultAttributesMap(Context context, Logger log
         }
 
 
-        Map<String, String> attrMap = new HashMap<String, String>();
+        Map<String, String> attrMap = new HashMap<>();
 
         attrMap.put(DEVICE_MODEL_KEY, androidDeviceModel);
         attrMap.put(SDK_VERSION_KEY, androidSdkVersionName);

android-sdk/src/main/java/com/optimizely/ab/android/sdk/OptimizelyManager.java

@@ -58,8 +58,8 @@ public class OptimizelyManager {
             LoggerFactory.getLogger(OptimizelyClient.class));
 
     @NonNull private DatafileHandler datafileHandler;
-    @NonNull private final long datafileDownloadInterval;
-    @NonNull private final long eventDispatchInterval;
+    private final long datafileDownloadInterval;
+    private final long eventDispatchInterval;
     @Nullable private EventHandler eventHandler = null;
     @NonNull private ErrorHandler errorHandler;
     @NonNull private Logger logger;
@@ -323,6 +323,7 @@ public String getProjectId() {
         return projectId;
     }
 
+    @NonNull
     public DatafileHandler getDatafileHandler() {
         return datafileHandler;
     }
@@ -390,6 +391,7 @@ private OptimizelyClient buildOptimizely(@NonNull Context context, @NonNull Stri
         return new OptimizelyClient(optimizely, LoggerFactory.getLogger(OptimizelyClient.class));
     }
 
+    @NonNull
     @VisibleForTesting
     public UserProfileService getUserProfileService() {
         return userProfileService;

datafile-handler/src/main/AndroidManifest.xml

@@ -29,7 +29,8 @@
         </service>
         <!--
           Add these lines to your manifest if you want the services to schedule themselves again after a boot
-          or package replace.
+          or package replace.  Without these lines in your application manifest, the DatafileRescheduler will not be used.
+          See {link test_app} AndroidManifest.xml as an example.
 
                 <receiver
                     android:name="DatafileRescheduler"

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/BackgroundWatchersCache.java

@@ -16,6 +16,7 @@
 
 package com.optimizely.ab.android.datafile_handler;
 
+import android.content.Context;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 
@@ -31,17 +32,33 @@
 
 /**
  * Caches a json dict that saves state about which project IDs have background watching enabled.
+ * This is used by the rescheduler to determine if backgrounding was on for a project id.  If backgrounding is on,
+ * then when the device is restarted or the app is reinstalled, the rescheduler will kick in and reschedule the datafile background
+ * download.  In order to use this the rescheduler needs to be included in the application manifest.
+ * Calling {@link DatafileHandler#stopBackgroundUpdates(Context, String)} sets this background cache to false.
  */
 class BackgroundWatchersCache {
     static final String BACKGROUND_WATCHERS_FILE_NAME = "optly-background-watchers.json";
     @NonNull private final Cache cache;
     @NonNull private final Logger logger;
 
+    /**
+     * Create BackgroundWatchersCache Object.
+     *
+     * @param cache object for caching project id and whether watched or not.
+     * @param logger the logger to log errors and warnings.
+     */
     BackgroundWatchersCache(@NonNull Cache cache, @NonNull Logger logger) {
         this.cache = cache;
         this.logger = logger;
     }
 
+    /**
+     * Set the watching flag for the proejct id.
+     * @param projectId project id to set watching.
+     * @param watching flag to signify if the project is running in the background.
+     * @return boolean indicating whether the set succeed or not
+     */
     boolean setIsWatching(@NonNull String projectId, boolean watching) {
         if (projectId.isEmpty()) {
             logger.error("Passed in an empty string for projectId");
@@ -61,6 +78,11 @@ boolean setIsWatching(@NonNull String projectId, boolean watching) {
         return false;
     }
 
+    /**
+     * Return if the project is set to be watched in the background or not.
+     * @param projectId project id to test
+     * @return true if it has backgrounding, false if not.
+     */
     boolean isWatching(@NonNull String projectId) {
         if (projectId.isEmpty()) {
             logger.error("Passed in an empty string for projectId");
@@ -81,6 +103,10 @@ boolean isWatching(@NonNull String projectId) {
         return false;
     }
 
+    /**
+     * Get a list of all project ids that are being watched for backgrounding.
+     * @return a list of project ids
+     */
     List<String> getWatchingProjectIds() {
         List<String> projectIds = new ArrayList<>();
         try {
@@ -101,6 +127,11 @@ List<String> getWatchingProjectIds() {
         return projectIds;
     }
 
+    /**
+     * Load the JSONObject from cache
+     * @return JSONObject if successful. JSONObject can be empty
+     * @throws JSONException if there was a problem parsing the JSON
+     */
     @Nullable
     private JSONObject load() throws JSONException {
         String backGroundWatchersFile = cache.load(BACKGROUND_WATCHERS_FILE_NAME);
@@ -112,10 +143,19 @@ private JSONObject load() throws JSONException {
         return new JSONObject(backGroundWatchersFile);
     }
 
+    /**
+     * Delete the background watchers cache file.
+     * @return true if successful and false if it failed.
+     */
     protected boolean delete() {
         return cache.delete(BACKGROUND_WATCHERS_FILE_NAME);
     }
 
+    /**
+     * Save the JSON string to the background cache file.
+     * @param backgroundWatchersJson JSON string containing projectid and whether watched or not.
+     * @return true if successful.
+     */
     private boolean save(String backgroundWatchersJson) {
         logger.info("Saving background watchers file {}.", BACKGROUND_WATCHERS_FILE_NAME);
         boolean saved = cache.save(BACKGROUND_WATCHERS_FILE_NAME, backgroundWatchersJson);

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/DatafileCache.java

@@ -27,7 +27,7 @@
 import org.slf4j.Logger;
 
 /**
- * Abstracts the actual data "file" {@link java.io.File}.
+ * Abstracts the actual data "file" {@link java.io.File}. to a cached file
  */
 public class DatafileCache {
 
@@ -37,25 +37,47 @@ public class DatafileCache {
     @NonNull private final String filename;
     @NonNull private final Logger logger;
 
+    /**
+     * Create a DatafileCache Object
+     * @param projectId project id for cache
+     * @param cache shared generic file based {link Cache}
+     * @param logger logger to use
+     */
     public DatafileCache(@NonNull String projectId, @NonNull Cache cache, @NonNull Logger logger) {
         this.cache = cache;
         this.filename = String.format(FILENAME, projectId);
         this.logger = logger;
     }
 
+    /**
+     * Delete the datafile cache
+     * @return true if successful
+     */
     public boolean delete() {
         return cache.delete(filename);
     }
 
+    /**
+     * Check to see if the datafile cache exists
+     * @return true if it exists
+     */
     public boolean exists() {
         return cache.exists(filename);
     }
 
+    /**
+     * Return the filename to the datafile cache
+     * @return filename for datafile cache
+     */
     @VisibleForTesting
     public String getFileName() {
         return filename;
     }
 
+    /**
+     * Loads the datafile from cache into a JSONObject
+     * @return JSONObject if exists or nulll if it doesn't or there was a problem
+     */
     @Nullable
     public JSONObject load() {
         String datafile = cache.load(filename);
@@ -71,6 +93,11 @@ public JSONObject load() {
         }
     }
 
+    /**
+     * Save a datafile to cache.
+     * @param dataFile to write to cache
+     * @return true if successful.
+     */
     public boolean save(String dataFile) {
         return cache.save(filename, dataFile);
     }

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/DatafileClient.java

@@ -35,6 +35,11 @@ public class DatafileClient {
     @NonNull private final Client client;
     @NonNull private final Logger logger;
 
+    /**
+     * Create a DatafileClient Object.
+     * @param client Shared {@link Client} object
+     * @param logger logger for logging.
+     */
     public DatafileClient(@NonNull Client client, @NonNull Logger logger) {
         this.client = client;
         this.logger = logger;
@@ -89,7 +94,12 @@ public String execute() {
                     return null;
                 } finally {
                     if (urlConnection != null) {
-                        urlConnection.disconnect();
+                        try {
+                            urlConnection.disconnect();
+                        }
+                        catch (Exception e) {
+                            logger.error("Error closing connection", e);
+                        }
                     }
                 }
             }

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/DatafileRescheduler.java

@@ -31,8 +31,22 @@
 /**
  * Broadcast Receiver that handles app upgrade and phone restart broadcasts in order
  * to reschedule {@link DatafileService}
+ * In order to use this class you must include the declaration in your AndroidManifest.xml.
+ * <pre>
+ * {@code
+ * <receiver
+ *  android:name="DatafileRescheduler"
+ *  android:enabled="true"
+ *  android:exported="false">
+ *  <intent-filter>
+ *      <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
+ *      <action android:name="android.intent.action.BOOT_COMPLETED" />
+ *  </intent-filter>
+ * </receiver>
+ * }
+ * </pre>
  *
- * @hide
+ * as well as set the download interval for datafile download in the Optimizely builder.
  */
 public class DatafileRescheduler extends BroadcastReceiver {
     Logger logger = LoggerFactory.getLogger(DatafileRescheduler.class);

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/DatafileService.java

@@ -35,8 +35,8 @@
 
 /**
  * Service that handles loading the datafile from cache or downloads it from the CDN
- *
- * @hide
+ * These services will only be used if you are using our {@link DefaultDatafileHandler}.
+ * You can chose to implement your own handler and use all or part of this package.
  */
 public class DatafileService extends Service {
     /**