Part1: Forward notifications between StorIOSQLite v1 and v3

build.gradle

@@ -58,6 +58,7 @@ ext.libraries = [
         // Core libraries
         supportAnnotations                       : 'com.android.support:support-annotations:' + supportLibsVersion,
 
+        rxJava                                   : 'io.reactivex:rxjava:1.2.1',
         rxJava2                                  : 'io.reactivex.rxjava2:rxjava:2.1.6',
         rxAndroid2                               : 'io.reactivex.rxjava2:rxandroid:2.0.1',
         kotlinStdLib                             : "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version",
@@ -73,6 +74,9 @@ ext.libraries = [
         storIOContentResolverAnnotationsProcessor: project(':storio-content-resolver-annotations-processor'),
         storIOTestCommon                         : project(':storio-test-common'),
 
+        // StorIO old versions
+        storIOSQLite1                            : 'com.pushtorefresh.storio:sqlite:1.13.0',
+
         // Libraries for tests and sample app
         junit                                    : 'junit:junit:4.12',
         assertJ                                  : 'org.assertj:assertj-core:3.9.0',                                    // http://joel-costigliola.github.io/assertj/assertj-core-news.html

settings.gradle

@@ -12,6 +12,8 @@ include ':storio-sqlite-annotations-processor-test'
 include ':storio-content-resolver-annotations-processor'
 include ':storio-content-resolver-annotations-processor-test'
 
+include ':storio-sqlite-interop1to3'
+
 include ':storio-test-without-rxjava'
 
 include ':storio-basic-sample-app'

storio-sqlite-interop1to3/build.gradle

@@ -0,0 +1,35 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion rootProject.ext.compileSdkVersion
+
+    defaultConfig {
+        versionName VERSION_NAME
+        versionCode Integer.parseInt(VERSION_CODE)
+        minSdkVersion rootProject.ext.minSdkVersion
+    }
+
+    packagingOptions {
+        exclude 'LICENSE.txt' // multiple libs have this file -> cause build error
+    }
+}
+
+dependencies {
+    implementation libraries.storIOSQLite1
+    implementation libraries.storIOSQLite
+
+    compileOnly libraries.rxJava
+    compileOnly libraries.rxJava2
+    testImplementation libraries.rxJava
+    testImplementation libraries.rxJava2
+
+    testImplementation libraries.junit
+    testImplementation libraries.kotlinStdLib
+    testImplementation libraries.mockitoKotlin
+    testImplementation libraries.assertJ
+}
+
+apply from: '../gradle/checkstyle.gradle'
+apply from: '../gradle/jacoco-android.gradle'
+apply from: '../gradle/publish-android-lib.gradle'

storio-sqlite-interop1to3/gradle.properties

@@ -0,0 +1,3 @@
+POM_NAME=storio-sqlite-interop1to3
+POM_ARTIFACT_ID=storio-sqlite-interop1to3
+POM_PACKAGING=jar

storio-sqlite-interop1to3/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="com.pushtorefresh.storio3.sqlite.interop1to3" />

storio-sqlite-interop1to3/src/main/java/com/pushtorefresh/storio3/sqlite/interop1to3/StorIOSQLite1To3.java

@@ -0,0 +1,80 @@
+package com.pushtorefresh.storio3.sqlite.interop1to3;
+
+import android.support.annotation.NonNull;
+
+import java.util.Collections;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import io.reactivex.BackpressureStrategy;
+import io.reactivex.functions.Consumer;
+import rx.functions.Action1;
+
+public class StorIOSQLite1To3 {
+
+    private final Set<com.pushtorefresh.storio.sqlite.Changes> forwardedChanges1 = Collections.newSetFromMap(
+            new ConcurrentHashMap<com.pushtorefresh.storio.sqlite.Changes, Boolean>()
+    );
+
+    private final Set<com.pushtorefresh.storio3.sqlite.Changes> forwardedChanges3 = Collections.newSetFromMap(
+            new ConcurrentHashMap<com.pushtorefresh.storio3.sqlite.Changes, Boolean>()
+    );
+
+    public void forwardNotifications(
+            @NonNull final com.pushtorefresh.storio.sqlite.StorIOSQLite sqlite1,
+            @NonNull final com.pushtorefresh.storio3.sqlite.StorIOSQLite sqlite3
+    ) {
+        com.pushtorefresh.storio.internal.Environment.throwExceptionIfRxJavaIsNotAvailable(
+                "forwardNotifications() requires rxJava2"
+        );
+        com.pushtorefresh.storio3.internal.Environment.throwExceptionIfRxJava2IsNotAvailable(
+                "forwardNotifications() requires rxJava2"
+        );
+
+        sqlite1.observeChanges()
+                .subscribe(new Action1<com.pushtorefresh.storio.sqlite.Changes>() {
+            @Override
+            public void call(@NonNull com.pushtorefresh.storio.sqlite.Changes changes1) {
+                if (!forwardedChanges1.remove(changes1)) {  // Check to prevent cyclic forwarding.
+                    final com.pushtorefresh.storio3.sqlite.Changes changes3ToForward
+                            = convertToV3(changes1);
+                    forwardedChanges3.add(changes3ToForward);
+                    sqlite3.lowLevel().notifyAboutChanges(changes3ToForward);
+                }
+            }
+        });
+
+        sqlite3.observeChanges(BackpressureStrategy.BUFFER)
+                .subscribe(new Consumer<com.pushtorefresh.storio3.sqlite.Changes>() {
+                    @Override
+                    public void accept(com.pushtorefresh.storio3.sqlite.Changes changes3) throws Exception {
+                        if (!forwardedChanges3.remove(changes3)) {  // Check to prevent cyclic forwarding.
+                            final com.pushtorefresh.storio.sqlite.Changes changes1ToForward
+                                    = convertToV1(changes3);
+                            forwardedChanges1.add(changes1ToForward);
+                            sqlite1.lowLevel().notifyAboutChanges(changes1ToForward);
+                        }
+                    }
+                });
+    }
+
+    @NonNull
+    private com.pushtorefresh.storio.sqlite.Changes convertToV1(
+            @NonNull com.pushtorefresh.storio3.sqlite.Changes changes3
+    ) {
+        return com.pushtorefresh.storio.sqlite.Changes.newInstance(
+                changes3.affectedTables(),
+                changes3.affectedTags()
+        );
+    }
+
+    @NonNull
+    private com.pushtorefresh.storio3.sqlite.Changes convertToV3(
+            @NonNull com.pushtorefresh.storio.sqlite.Changes changes1
+    ) {
+        return com.pushtorefresh.storio3.sqlite.Changes.newInstance(
+                changes1.affectedTables(),
+                changes1.affectedTags()
+        );
+    }
+}

storio-sqlite-interop1to3/src/test/java/com/pushtorefresh/storio3/sqlite/interop1to3/StorIOSQLite1To3Test.kt

@@ -0,0 +1,114 @@
+package com.pushtorefresh.storio3.sqlite.interop1to3
+
+import com.nhaarman.mockito_kotlin.mock
+import io.reactivex.BackpressureStrategy
+import org.junit.Before
+import org.junit.Test
+import com.pushtorefresh.storio.sqlite.Changes as Changes1
+import com.pushtorefresh.storio.sqlite.StorIOSQLite as StorIOSQLite1
+import com.pushtorefresh.storio.sqlite.impl.DefaultStorIOSQLite as DefaultStorIOSQLite1
+import com.pushtorefresh.storio3.sqlite.Changes as Changes3
+import com.pushtorefresh.storio3.sqlite.StorIOSQLite as StorIOSQLite3
+import com.pushtorefresh.storio3.sqlite.impl.DefaultStorIOSQLite as DefaultStorIOSQLite3
+import io.reactivex.subscribers.TestSubscriber as TestSubscriberRx2
+import rx.observers.TestSubscriber as TestSubscriberRx1
+
+class StorIOSQLite1To3Test {
+
+    val observer1 = TestSubscriberRx1.create<Changes1>()
+
+    val observer3 = TestSubscriberRx2.create<Changes3>()
+
+    lateinit var storIOSQLite1: StorIOSQLite1
+
+    lateinit var storIOSQLite3: StorIOSQLite3
+
+    lateinit var changes1WithTags: Changes1
+
+    lateinit var changes1WithoutTags: Changes1
+
+    lateinit var changes3WithTags: Changes3
+
+    lateinit var changes3WithoutTags: Changes3
+
+    @Before
+    fun `before each test`() {
+        storIOSQLite1 = DefaultStorIOSQLite1.builder()
+                .sqliteOpenHelper(mock())
+                .defaultScheduler(null)
+                .build()
+        storIOSQLite3 = DefaultStorIOSQLite3.builder()
+                .sqliteOpenHelper(mock())
+                .defaultRxScheduler(null)
+                .build()
+        val interop = StorIOSQLite1To3()
+        interop.forwardNotifications(storIOSQLite1, storIOSQLite3)
+
+        storIOSQLite1.observeChanges().subscribe(observer1)
+        storIOSQLite3.observeChanges(BackpressureStrategy.BUFFER).subscribe(observer3)
+
+        val tables = HashSet<String>()
+        tables.add("table1")
+        tables.add("table2")
+
+        val tags = HashSet<String>()
+        tags.add("tag1")
+        tags.add("tag2")
+
+        changes1WithTags = Changes1.newInstance(tables, tags)
+        changes3WithTags = Changes3.newInstance(tables, tags)
+
+        changes1WithoutTags = Changes1.newInstance(tables, null as Collection<String>?)
+        changes3WithoutTags = Changes3.newInstance(tables, null as Collection<String>?)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 1 to 3 with tags`() {
+        storIOSQLite1.lowLevel().notifyAboutChanges(changes1WithTags)
+        observer1.assertValue(changes1WithTags)
+        observer3.assertValue(changes3WithTags)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 1 to 3 without tags`() {
+        storIOSQLite1.lowLevel().notifyAboutChanges(changes1WithoutTags)
+        observer1.assertValue(changes1WithoutTags)
+        observer3.assertValue(changes3WithoutTags)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 1 to 3 multiple`() {
+        storIOSQLite1.lowLevel().notifyAboutChanges(changes1WithTags)
+        observer1.assertValue(changes1WithTags)
+        observer3.assertValue(changes3WithTags)
+
+        storIOSQLite1.lowLevel().notifyAboutChanges(changes1WithTags)
+        observer1.assertValues(changes1WithTags, changes1WithTags)
+        observer3.assertValues(changes3WithTags, changes3WithTags)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 3 to 1 with tags`() {
+        storIOSQLite3.lowLevel().notifyAboutChanges(changes3WithTags)
+        observer1.assertValue(changes1WithTags)
+        observer3.assertValue(changes3WithTags)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 3 to 1 without tags`() {
+        storIOSQLite3.lowLevel().notifyAboutChanges(changes3WithoutTags)
+        observer1.assertValue(changes1WithoutTags)
+        observer3.assertValue(changes3WithoutTags)
+    }
+
+    @Test
+    fun `forwardNotifications should forward from 3 to 1 with multiple`() {
+        storIOSQLite3.lowLevel().notifyAboutChanges(changes3WithTags)
+        observer1.assertValue(changes1WithTags)
+        observer3.assertValue(changes3WithTags)
+
+        storIOSQLite3.lowLevel().notifyAboutChanges(changes3WithTags)
+        observer1.assertValues(changes1WithTags, changes1WithTags)
+        observer3.assertValues(changes3WithTags, changes3WithTags)
+    }
+}