async database statement queue

the idea is to take quick database updates outside the main (UI) thread

this helps when the database is in a transaction updating accounts or
transactions which can take considerable time

diff --git a/app/src/main/java/net/ktnx/mobileledger/async/DbOpItem.java b/app/src/main/java/net/ktnx/mobileledger/async/DbOpItem.java
new file mode 100644 (file)
index 0000000..7ecce27
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/async/DbOpItem.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2019 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.async;
+
+class DbOpItem {
+    String sql;
+    Object[] params;
+    public DbOpItem(String sql, Object[] params) {
+        this.sql = sql;
+        this.params = params;
+    }
+    public DbOpItem(String sql) {
+        this(sql, null);
+    }
+}

diff --git a/app/src/main/java/net/ktnx/mobileledger/async/DbOpQueue.java b/app/src/main/java/net/ktnx/mobileledger/async/DbOpQueue.java
new file mode 100644 (file)
index 0000000..7bf5cec
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/async/DbOpQueue.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2019 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.async;
+
+import android.util.Log;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+public class DbOpQueue {
+    static private final BlockingQueue<DbOpItem> queue = new LinkedBlockingQueue<>();
+    static private DbOpRunner runner;
+    synchronized static public void init() {
+        if (runner != null) return;
+        Log.d("opQueue", "Starting runner thread");
+        runner = new DbOpRunner(queue);
+        runner.start();
+    }
+    static public void done() {
+        runner.interrupt();
+    }
+    public static void add(String sql, Object[] params) {
+        init();
+        Log.d("opQueue", "Adding " + sql);
+        queue.add(new DbOpItem(sql, params));
+    }
+    static void add(String sql) {
+        queue.add(new DbOpItem(sql));
+    }
+}

diff --git a/app/src/main/java/net/ktnx/mobileledger/async/DbOpRunner.java b/app/src/main/java/net/ktnx/mobileledger/async/DbOpRunner.java
new file mode 100644 (file)
index 0000000..9404d7d
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/async/DbOpRunner.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2019 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.async;
+
+import android.database.sqlite.SQLiteDatabase;
+import android.util.Log;
+
+import net.ktnx.mobileledger.utils.MLDB;
+
+import java.util.concurrent.BlockingQueue;
+
+class DbOpRunner extends Thread {
+    private final BlockingQueue<DbOpItem> queue;
+    public DbOpRunner(BlockingQueue<DbOpItem> queue) {
+        this.queue = queue;
+    }
+    @Override
+    public void run() {
+        while (!interrupted()) {
+            try {
+                DbOpItem item = queue.take();
+                Log.d("opQrunner", "Got "+item.sql);
+                SQLiteDatabase db = MLDB.getDatabase();
+                Log.d("opQrunner", "Executing "+item.sql);
+                db.execSQL(item.sql, item.params);
+            }
+            catch (InterruptedException e) {
+                break;
+            }
+        }
+    }
+}

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java b/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
index 3e8e9c569747f42ae25df98af2bf546b3793882a..cfceb7ca7f1786d9a9470dd6c0934dbaf5e9b8c6 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
@@ -38,6 +38,7 @@ import android.widget.Toast;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
 import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.async.DbOpQueue;
 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
 import net.ktnx.mobileledger.model.Data;