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Code Issues Releases Wiki Activity

Batch the import of old activity samples to save memory during import

master
cpfeiffer 2016-08-18 20:38:48 +02:00
parent ce8af615d1
commit deeaa87df7
1 changed files with 13 additions and 2 deletions
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15
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/database/DBHelper.java
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@ -398,6 +398,8 @@ public class DBHelper {
String order = "timestamp";
final String where = "provider=" + sampleProvider.getID();
final int BATCH_SIZE = 100000; // 100.000 samples = rougly 20 MB per batch
List<T> newSamples;
try (Cursor cursor = fromDb.query(TABLE_GBACTIVITYSAMPLES, null, where, null, null, null, order)) {
int colTimeStamp = cursor.getColumnIndex(KEY_TIMESTAMP);
int colIntensity = cursor.getColumnIndex(KEY_INTENSITY);
@ -406,7 +408,7 @@ public class DBHelper {
int colCustomShort = cursor.getColumnIndex(KEY_CUSTOM_SHORT);
Long deviceId = DBHelper.getDevice(targetDevice, targetSession).getId();
Long userId = user.getId();
List<T> newSamples = new ArrayList<>(cursor.getCount());
newSamples = new ArrayList<>(Math.min(BATCH_SIZE, cursor.getCount()));
while (cursor.moveToNext()) {
T newSample = sampleProvider.createActivitySample();
newSample.setProvider(sampleProvider);
@ -422,8 +424,17 @@ public class DBHelper {
newSample.setHeartRate(ActivitySample.NOT_MEASURED);
}
newSamples.add(newSample);
if ((newSamples.size() % BATCH_SIZE) == 0) {
sampleProvider.getSampleDao().insertOrReplaceInTx(newSamples, true);
targetSession.clear();
newSamples.clear();
}
}
// and insert the remaining samples
if (!newSamples.isEmpty()) {
sampleProvider.getSampleDao().insertOrReplaceInTx(newSamples, true);
}
sampleProvider.getSampleDao().insertOrReplaceInTx(newSamples, true);
}
}