wine/gecko
0
0
Fork 0
mirror of https://gitlab.winehq.org/wine/wine-gecko.git synced 2024-09-13 09:24:08 -07:00
Code Issues Packages Projects Releases Wiki Activity

Bug 1006947 - Part 1: enable WAL on the Java side of SQLiteBridge. r=gcp

Browse Source
This commit is contained in:
Richard Newman 2014-05-30 12:29:04 -07:00
parent 7c4f23aabd
commit 052cc1758d
1 changed files with 62 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
mobile/android/base/sqlite/SQLiteBridge.java
View File

@ -10,6 +10,7 @@ import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.text.TextUtils;
import android.util.Log;
import org.mozilla.gecko.mozglue.RobocopTarget;
import java.util.ArrayList;
@ -26,8 +27,9 @@ public class SQLiteBridge {
// Path to the database. If this database was not opened with openDatabase, we reopen it every query.
private String mDb;
// pointer to the database if it was opened with openDatabase
protected long mDbPointer = 0;
// Pointer to the database if it was opened with openDatabase. 0 implies closed.
protected volatile long mDbPointer = 0L;
// Values remembered after a query.
private long[] mQueryResults;
@ -38,6 +40,12 @@ public class SQLiteBridge {
private static final int RESULT_INSERT_ROW_ID = 0;
private static final int RESULT_ROWS_CHANGED = 1;
// Shamelessly cribbed from db/sqlite3/src/moz.build.
private static final int DEFAULT_PAGE_SIZE_BYTES = 32768;
// The same size we use elsewhere.
private static final int MAX_WAL_SIZE_BYTES = 524288;
// JNI code in $(topdir)/mozglue/android/..
private static native MatrixBlobCursor sqliteCall(String aDb, String aQuery,
String[] aParams,
@ -254,9 +262,12 @@ public class SQLiteBridge {
bridge = new SQLiteBridge(path);
bridge.mDbPointer = SQLiteBridge.openDatabase(path);
} catch (SQLiteBridgeException ex) {
// catch and rethrow as a SQLiteException to match SQLiteDatabase
// Catch and rethrow as a SQLiteException to match SQLiteDatabase.
throw new SQLiteException(ex.getMessage());
}
prepareWAL(bridge);
return bridge;
}
@ -264,11 +275,11 @@ public class SQLiteBridge {
if (isOpen()) {
closeDatabase(mDbPointer);
}
mDbPointer = 0;
mDbPointer = 0L;
}
public boolean isOpen() {
return mDbPointer > 0;
return mDbPointer != 0;
}
public void beginTransaction() throws SQLiteBridgeException {
@ -324,4 +335,50 @@ public class SQLiteBridge {
close();
}
}
private static void prepareWAL(final SQLiteBridge bridge) {
// Prepare for WAL mode. If we can, we switch to journal_mode=WAL, then
// set the checkpoint size appropriately. If we can't, then we fall back
// to truncating and synchronous writes.
final Cursor cursor = bridge.internalQuery("PRAGMA journal_mode=WAL", null);
try {
if (cursor.moveToFirst()) {
String journalMode = cursor.getString(0);
Log.d(LOGTAG, "Journal mode: " + journalMode);
if ("wal".equals(journalMode)) {
// Success! Let's make sure we autocheckpoint at a reasonable interval.
final int pageSizeBytes = bridge.getPageSizeBytes();
final int checkpointPageCount = MAX_WAL_SIZE_BYTES / pageSizeBytes;
bridge.internalQuery("PRAGMA wal_autocheckpoint=" + checkpointPageCount, null).close();
} else {
if (!"truncate".equals(journalMode)) {
Log.w(LOGTAG, "Unable to activate WAL journal mode. Using truncate instead.");
bridge.internalQuery("PRAGMA journal_mode=TRUNCATE", null).close();
}
Log.w(LOGTAG, "Not using WAL mode: using synchronous=FULL instead.");
bridge.internalQuery("PRAGMA synchronous=FULL", null).close();
}
}
} finally {
cursor.close();
}
}
private int getPageSizeBytes() {
if (!isOpen()) {
throw new IllegalStateException("Database not open.");
}
final Cursor cursor = internalQuery("PRAGMA page_size", null);
try {
if (!cursor.moveToFirst()) {
Log.w(LOGTAG, "Unable to retrieve page size.");
return DEFAULT_PAGE_SIZE_BYTES;
}
return cursor.getInt(0);
} finally {
cursor.close();
}
}
}