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Code Releases Wiki Activity

New incremental, cumulative database upgrades and downgrades

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This commit is contained in:
cpfeiffer 2015-07-10 00:31:45 +02:00
parent cc549a6c49
commit 8b54c6e5c4
6 changed files with 159 additions and 46 deletions
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102
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/ActivityDatabaseHandler.java
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@ -5,76 +5,86 @@ import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.widget.Toast;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import nodomain.freeyourgadget.gadgetbridge.GBActivitySample;
import nodomain.freeyourgadget.gadgetbridge.GBApplication;
import nodomain.freeyourgadget.gadgetbridge.database.schema.ActivityDBCreationScript;
import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.*;
public class ActivityDatabaseHandler extends SQLiteOpenHelper {
private static final Logger LOG = LoggerFactory.getLogger(ActivityDatabaseHandler.class);
private static final int DATABASE_VERSION = 5;
private static final String DATABASE_NAME = "ActivityDatabase";
private static final String TABLE_GBACTIVITYSAMPLES = "GBActivitySamples";
private static final String KEY_TIMESTAMP = "timestamp";
private static final String KEY_PROVIDER = "provider";
private static final String KEY_INTENSITY = "intensity";
private static final String KEY_STEPS = "steps";
private static final String KEY_TYPE = "type";
public ActivityDatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_GBACTIVITYSAMPLES_TABLE = "CREATE TABLE " + TABLE_GBACTIVITYSAMPLES + " ("
+ KEY_TIMESTAMP + " INT,"
+ KEY_PROVIDER + " TINYINT,"
+ KEY_INTENSITY + " SMALLINT,"
+ KEY_STEPS + " TINYINT,"
+ KEY_TYPE + " TINYINT,"
+ " PRIMARY KEY (" + KEY_TIMESTAMP + "," + KEY_PROVIDER + ") ON CONFLICT REPLACE)" + getWithoutRowId();
db.execSQL(CREATE_GBACTIVITYSAMPLES_TABLE);
}
/**
* WITHOUT ROWID is only available with sqlite 3.8.2, which is available
* with Lollipop and later.
*
* @return the "WITHOUT ROWID" string or an empty string for pre-Lollipop devices
*/
private String getWithoutRowId() {
if (GBApplication.isRunningLollipopOrLater()) {
return " WITHOUT ROWID;";
try {
ActivityDBCreationScript script = new ActivityDBCreationScript();
script.createSchema(db);
} catch (RuntimeException ex) {
LOG.error("Error creatomg database", ex);
Toast.makeText(GBApplication.getContext(), "Error creating database.", Toast.LENGTH_SHORT).show();
}
return "";
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
if (newVersion == 5 && (oldVersion == 4 || oldVersion == 3)) {
String CREATE_NEW_GBACTIVITYSAMPLES_TABLE = "CREATE TABLE NEW ("
+ KEY_TIMESTAMP + " INT,"
+ KEY_PROVIDER + " TINYINT,"
+ KEY_INTENSITY + " SMALLINT,"
+ KEY_STEPS + " TINYINT,"
+ KEY_TYPE + " TINYINT,"
+ " PRIMARY KEY (" + KEY_TIMESTAMP + "," + KEY_PROVIDER + ") ON CONFLICT REPLACE)" + getWithoutRowId();
db.execSQL(CREATE_NEW_GBACTIVITYSAMPLES_TABLE);
db.execSQL("insert into NEW select timestamp,provider,intensity,steps,type from " + TABLE_GBACTIVITYSAMPLES + ";");
db.execSQL("Drop table " + TABLE_GBACTIVITYSAMPLES + ";");
db.execSQL("alter table NEW RENAME TO " + TABLE_GBACTIVITYSAMPLES + ";");
} else {
//FIXME: do not just recreate
db.execSQL("DROP TABLE IF EXISTS " + TABLE_GBACTIVITYSAMPLES);
onCreate(db);
try {
for (int i = oldVersion + 1; i <= newVersion; i++) {
DBUpdateScript updater = getUpdateScript(db, i);
if (updater != null) {
LOG.info("upgrading activity database to version " + i);
updater.upgradeSchema(db);
}
}
LOG.info("activity database is now at version " + newVersion);
} catch (RuntimeException ex) {
LOG.error("Error upgrading db version. ", ex);
Toast.makeText(GBApplication.getContext(), "Error upgrading database.", Toast.LENGTH_SHORT).show();
throw ex; // reject upgrade
}
}
@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
try {
for (int i = oldVersion; i >= newVersion; i--) {
DBUpdateScript updater = getUpdateScript(db, i);
if (updater != null) {
LOG.info("downgrading activity database to version " + (i - 1));
updater.downgradeSchema(db);
}
}
LOG.info("activity database is now at version " + newVersion);
} catch (RuntimeException ex) {
LOG.error("Error downgrading db version. ", ex);
Toast.makeText(GBApplication.getContext(), "Error downgrading database.", Toast.LENGTH_SHORT).show();
throw ex; // reject downgrade
}
}
private DBUpdateScript getUpdateScript(SQLiteDatabase db, int version) {
try {
Class<?> updateClass = getClass().getClassLoader().loadClass(getClass().getPackage().getName() + ".schema.ActivityDBUpdate_" + version);
return (DBUpdateScript) updateClass.newInstance();
} catch (ClassNotFoundException e) {
return null;
} catch (InstantiationException | IllegalAccessException e) {
throw new RuntimeException("Error instantiating DBUpdate class for version " + version, e);
}
}
public void addGBActivitySample(GBActivitySample GBActivitySample) {
try (SQLiteDatabase db = this.getWritableDatabase()) {

14
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBConstants.java Normal file
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@ -0,0 +1,14 @@
package nodomain.freeyourgadget.gadgetbridge.database;
public class DBConstants {
public static final String DATABASE_NAME = "ActivityDatabase";
public static final String TABLE_GBACTIVITYSAMPLES = "GBActivitySamples";
public static final String TABLE_STEPS_PER_DAY = "StepsPerDay";
public static final String KEY_TIMESTAMP = "timestamp";
public static final String KEY_PROVIDER = "provider";
public static final String KEY_INTENSITY = "intensity";
public static final String KEY_STEPS = "steps";
public static final String KEY_TYPE = "type";
}

20
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBHelper.java
View File

@ -11,6 +11,7 @@ import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import nodomain.freeyourgadget.gadgetbridge.GBApplication;
import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
public class DBHelper {
@ -64,4 +65,23 @@ public class DBHelper {
}
}
}
public static void dropTable(String tableName, SQLiteDatabase db) {
db.delete(tableName, null, null);
}
/**
* WITHOUT ROWID is only available with sqlite 3.8.2, which is available
* with Lollipop and later.
*
* @return the "WITHOUT ROWID" string or an empty string for pre-Lollipop devices
*/
public static String getWithoutRowId() {
if (GBApplication.isRunningLollipopOrLater()) {
return " WITHOUT ROWID;";
}
return "";
}
}

16
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBUpdateScript.java Normal file
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@ -0,0 +1,16 @@
package nodomain.freeyourgadget.gadgetbridge.database;
import android.database.sqlite.SQLiteDatabase;
/**
* Interface for updating a database schema.
* Implementors provide the update from the prior schema
* version to this version, and the downgrade from this schema
* version to the next lower version.
*
* Implementations must have a public, no-arg constructor.
*/
public interface DBUpdateScript {
void upgradeSchema(SQLiteDatabase database);
void downgradeSchema(SQLiteDatabase database);
}

21
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBCreationScript.java Normal file
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@ -0,0 +1,21 @@
package nodomain.freeyourgadget.gadgetbridge.database.schema;
import android.database.sqlite.SQLiteDatabase;
import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
import nodomain.freeyourgadget.gadgetbridge.database.DBUpdateScript;
import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.*;
public class ActivityDBCreationScript {
public void createSchema(SQLiteDatabase db) {
String CREATE_GBACTIVITYSAMPLES_TABLE = "CREATE TABLE " + TABLE_GBACTIVITYSAMPLES + " ("
+ KEY_TIMESTAMP + " INT,"
+ KEY_PROVIDER + " TINYINT,"
+ KEY_INTENSITY + " SMALLINT,"
+ KEY_STEPS + " TINYINT,"
+ KEY_TYPE + " TINYINT,"
+ " PRIMARY KEY (" + KEY_TIMESTAMP + "," + KEY_PROVIDER + ") ON CONFLICT REPLACE)" + DBHelper.getWithoutRowId();
db.execSQL(CREATE_GBACTIVITYSAMPLES_TABLE);
}
}

32
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/schema/ActivityDBUpdate_4.java Normal file
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@ -0,0 +1,32 @@
package nodomain.freeyourgadget.gadgetbridge.database.schema;
import android.database.sqlite.SQLiteDatabase;
import nodomain.freeyourgadget.gadgetbridge.database.DBHelper;
import nodomain.freeyourgadget.gadgetbridge.database.DBUpdateScript;
import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.TABLE_GBACTIVITYSAMPLES;
import static nodomain.freeyourgadget.gadgetbridge.database.DBConstants.TABLE_STEPS_PER_DAY;
/**
* Upgrade and downgrade with DB versions <= 5 is not supported.
* Just recreates the default schema. Those GB versions may or may not
* work with that, but this code will probably not create a DB for them
* anyway.
*/
public class ActivityDBUpdate_4 extends ActivityDBCreationScript implements DBUpdateScript {
@Override
public void upgradeSchema(SQLiteDatabase db) {
recreateSchema(db);
}
@Override
public void downgradeSchema(SQLiteDatabase db) {
recreateSchema(db);
}
private void recreateSchema(SQLiteDatabase db) {
DBHelper.dropTable(TABLE_GBACTIVITYSAMPLES, db);
createSchema(db);
}
}