Merge pull request #73 from evgenii-kanivets/cache

Cache

Author: Evgenii

app/src/main/java/com/blogspot/e_kanivets/moneytracker/MtApp.java

@@ -5,7 +5,8 @@
 import com.blogspot.e_kanivets.moneytracker.di.AppComponent;
 import com.blogspot.e_kanivets.moneytracker.di.DaggerAppComponent;
 import com.blogspot.e_kanivets.moneytracker.di.module.ControllerModule;
-import com.blogspot.e_kanivets.moneytracker.di.module.RepoModule;
+import com.blogspot.e_kanivets.moneytracker.di.module.repo.CachedRepoModule;
+import com.blogspot.e_kanivets.moneytracker.di.module.repo.RepoModule;
 
 /**
  * Custom application implementation.
@@ -37,7 +38,7 @@ public AppComponent getAppComponent() {
 
     private AppComponent buildComponent() {
         return DaggerAppComponent.builder()
-                .repoModule(new RepoModule(get()))
+                .cachedRepoModule(new CachedRepoModule(get()))
                 .controllerModule(new ControllerModule())
                 .build();
     }

app/src/main/java/com/blogspot/e_kanivets/moneytracker/di/AppComponent.java

@@ -10,8 +10,8 @@
 import com.blogspot.e_kanivets.moneytracker.activity.exchange_rate.ExchangeRatesActivity;
 import com.blogspot.e_kanivets.moneytracker.activity.record.AddRecordActivity;
 import com.blogspot.e_kanivets.moneytracker.activity.record.MainActivity;
+import com.blogspot.e_kanivets.moneytracker.di.module.repo.CachedRepoModule;
 import com.blogspot.e_kanivets.moneytracker.di.module.ControllerModule;
-import com.blogspot.e_kanivets.moneytracker.di.module.RepoModule;
 import com.blogspot.e_kanivets.moneytracker.ui.presenter.AccountsSummaryPresenter;
 
 import javax.inject.Singleton;
@@ -24,7 +24,7 @@
  *
  * @author Evgenii Kanivets
  */
-@Component(modules = {RepoModule.class, ControllerModule.class})
+@Component(modules = {CachedRepoModule.class, ControllerModule.class})
 @Singleton
 public interface AppComponent {
     void inject(MainActivity mainActivity);

app/src/main/java/com/blogspot/e_kanivets/moneytracker/di/module/repo/CachedRepoModule.java

@@ -0,0 +1,80 @@
+package com.blogspot.e_kanivets.moneytracker.di.module.repo;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+
+import com.blogspot.e_kanivets.moneytracker.entity.Account;
+import com.blogspot.e_kanivets.moneytracker.entity.Category;
+import com.blogspot.e_kanivets.moneytracker.entity.ExchangeRate;
+import com.blogspot.e_kanivets.moneytracker.entity.Record;
+import com.blogspot.e_kanivets.moneytracker.entity.Transfer;
+import com.blogspot.e_kanivets.moneytracker.repo.AccountRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.CategoryRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.DbHelper;
+import com.blogspot.e_kanivets.moneytracker.repo.ExchangeRateRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.RecordRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.TransferRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.base.IRepo;
+import com.blogspot.e_kanivets.moneytracker.repo.cache.BaseCache;
+
+import javax.inject.Singleton;
+
+import dagger.Module;
+import dagger.Provides;
+
+/**
+ * Dagger 2 module to provide {@link IRepo} dependencies.
+ * Created on 3/29/16.
+ *
+ * @author Evgenii Kanivets
+ */
+@Module
+public class CachedRepoModule {
+    private Context context;
+
+    public CachedRepoModule(Context context) {
+        this.context = context;
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public DbHelper providesDbHelper() {
+        return new DbHelper(context);
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public IRepo<Account> providesAccountRepo(DbHelper dbHelper) {
+        return new BaseCache<>(new AccountRepo(dbHelper));
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public IRepo<Category> providesCategoryRepo(DbHelper dbHelper) {
+        return new BaseCache<>(new CategoryRepo(dbHelper));
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public IRepo<ExchangeRate> providesExchangeRateRepo(DbHelper dbHelper) {
+        return new BaseCache<>(new ExchangeRateRepo(dbHelper));
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public IRepo<Record> providesRecordRepo(DbHelper dbHelper) {
+        return new BaseCache<>(new RecordRepo(dbHelper));
+    }
+
+    @Provides
+    @NonNull
+    @Singleton
+    public IRepo<Transfer> providesTransferRepo(DbHelper dbHelper) {
+        return new BaseCache<>(new TransferRepo(dbHelper));
+    }
+}

app/src/main/java/com/blogspot/e_kanivets/moneytracker/di/module/RepoModule.java renamed to app/src/main/java/com/blogspot/e_kanivets/moneytracker/di/module/repo/RepoModule.java

@@ -1,4 +1,4 @@
-package com.blogspot.e_kanivets.moneytracker.di.module;
+package com.blogspot.e_kanivets.moneytracker.di.module.repo;
 
 import android.content.Context;
 import android.support.annotation.NonNull;

app/src/main/java/com/blogspot/e_kanivets/moneytracker/repo/cache/BaseCache.java

@@ -0,0 +1,79 @@
+package com.blogspot.e_kanivets.moneytracker.repo.cache;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.util.LruCache;
+
+import com.blogspot.e_kanivets.moneytracker.entity.base.IEntity;
+import com.blogspot.e_kanivets.moneytracker.repo.base.IRepo;
+
+import java.util.List;
+
+/**
+ * Cache for {@link IRepo} instances. Use Decorator pattern.
+ * Created on 4/19/16.
+ *
+ * @author Evgenii Kanivets
+ */
+public class BaseCache<T extends IEntity> implements IRepo<T> {
+    @SuppressWarnings("unused")
+    private static final String TAG = "BaseCache";
+
+    private static final int CACHE_SIZE = 1024 * 1024; // 1MiB
+
+    private LruCache<Long, T> lruCache;
+
+    @NonNull
+    private IRepo<T> repo;
+
+    public BaseCache(@NonNull IRepo<T> repo) {
+        this.repo = repo;
+        lruCache = new LruCache<>(CACHE_SIZE);
+    }
+
+    @Nullable
+    @Override
+    public T create(@Nullable T instance) {
+        T createdT = repo.create(instance);
+        if (createdT != null) lruCache.put(createdT.getId(), createdT);
+        return createdT;
+    }
+
+    @Nullable
+    @Override
+    public T read(long id) {
+        T cachedT = lruCache.get(id);
+        if (cachedT == null) {
+            T readT = repo.read(id);
+            if (readT != null) lruCache.put(readT.getId(), readT);
+            return readT;
+        } else return cachedT;
+    }
+
+    @Nullable
+    @Override
+    public T update(@Nullable T instance) {
+        T updatedT = repo.update(instance);
+        if (updatedT != null) lruCache.put(updatedT.getId(), updatedT);
+        return updatedT;
+    }
+
+    @Override
+    public boolean delete(@Nullable T instance) {
+        boolean deleted = repo.delete(instance);
+        if (instance != null && deleted) lruCache.remove(instance.getId());
+        return deleted;
+    }
+
+    @NonNull
+    @Override
+    public List<T> readAll() {
+        return repo.readAll();
+    }
+
+    @NonNull
+    @Override
+    public List<T> readWithCondition(@Nullable String condition, @Nullable String[] args) {
+        return repo.readWithCondition(condition, args);
+    }
+}