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Code Releases Wiki Activity

Move activity data and progress manipulation into dedicated methods

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I did this in trying to understand the code better and to easier allow
for error handling/transaction rollback to be added.
This commit is contained in:
cpfeiffer 2015-09-19 23:32:10 +02:00
parent 3852fcd756
commit d9b4bbe550
2 changed files with 90 additions and 30 deletions
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114
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/miband/operations/FetchActivityOperation.java
View File

@ -31,28 +31,89 @@ import nodomain.freeyourgadget.gadgetbridge.service.devices.miband.MiBandSupport
import nodomain.freeyourgadget.gadgetbridge.util.DateTimeUtils;
import nodomain.freeyourgadget.gadgetbridge.util.GB;
/**
* An operation that fetches activity data. For every fetch, a new operation must
* be created, i.e. an operation may not be reused for multiple fetches.
*/
public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport> {
private static final Logger LOG = LoggerFactory.getLogger(FetchActivityOperation.class);
private static final byte[] fetch = new byte[]{MiBandService.COMMAND_FETCH_DATA};
//temporary buffer, size is a multiple of 60 because we want to store complete minutes (1 minute = 3 bytes)
private static final int activityDataHolderSize = 3 * 60 * 4; // 8h
private static final int activityDataHolderSize = 3 * 60 * 4; // 4h
private static class ActivityStruct {
public byte[] activityDataHolder = new byte[activityDataHolderSize];
private byte[] activityDataHolder = new byte[activityDataHolderSize];
//index of the buffer above
public int activityDataHolderProgress = 0;
private int activityDataHolderProgress = 0;
//number of bytes we will get in a single data transfer, used as counter
public int activityDataRemainingBytes = 0;
private int activityDataRemainingBytes = 0;
//same as above, but remains untouched for the ack message
public int activityDataUntilNextHeader = 0;
private int activityDataUntilNextHeader = 0;
//timestamp of the single data transfer, incremented to store each minute's data
public GregorianCalendar activityDataTimestampProgress = null;
private GregorianCalendar activityDataTimestampProgress = null;
//same as above, but remains untouched for the ack message
public GregorianCalendar activityDataTimestampToAck = null;
private GregorianCalendar activityDataTimestampToAck = null;
public boolean hasRoomFor(byte[] value) {
return activityDataRemainingBytes >= value.length;
}
public boolean isValidData(byte[] value) {
//I don't like this clause, but until we figure out why we get different data sometimes this should work
return value.length == 20 || value.length == activityDataRemainingBytes;
}
public boolean isBufferFull() {
return activityDataHolderSize == activityDataHolderProgress;
}
public void buffer(byte[] value) {
System.arraycopy(value, 0, activityDataHolder, activityDataHolderProgress, value.length);
activityDataHolderProgress += value.length;
activityDataRemainingBytes -= value.length;
validate();
}
private void validate() {
GB.assertThat(activityDataRemainingBytes >= 0, "Illegal state, remaining bytes is negative");
}
public boolean isFirstChunk() {
return activityDataTimestampProgress == null;
}
public void startNewBlock(GregorianCalendar timestamp, int dataUntilNextHeader) {
GB.assertThat(timestamp != null, "Timestamp must not be null");
if (isFirstChunk()) {
activityDataTimestampProgress = timestamp;
} else {
if (timestamp.getTimeInMillis() >= activityDataTimestampProgress.getTimeInMillis()) {
activityDataTimestampProgress = timestamp;
} else {
// something is fishy here... better not trust the given timestamp and simply
// (re)use the current one
// we do accept the timestamp to ack though, so that the bogus data is properly cleared on the band
}
}
activityDataTimestampToAck = (GregorianCalendar) timestamp.clone();
activityDataRemainingBytes = activityDataUntilNextHeader = dataUntilNextHeader;
validate();
}
public boolean isBlockFinished() {
return activityDataRemainingBytes == 0;
}
public void bufferFlushed(int minutes) {
activityDataTimestampProgress.add(Calendar.MINUTE, minutes);
activityDataHolderProgress = 0;
}
}
private ActivityStruct activityStruct;
private ActivityStruct activityStruct = new ActivityStruct();
public FetchActivityOperation(MiBandSupport support) {
super(support);
@ -98,11 +159,6 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
* @param value
*/
private void handleActivityNotif(byte[] value) {
boolean firstChunk = activityStruct == null;
if (firstChunk) {
activityStruct = new ActivityStruct();
}
if (value.length == 11) {
// byte 0 is the data type: 1 means that each minute is represented by a triplet of bytes
int dataType = value[0];
@ -123,7 +179,7 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
// after dataUntilNextHeader bytes we will get a new packet of 11 bytes that should be parsed
// as we just did
if (firstChunk && dataUntilNextHeader != 0) {
if (activityStruct.isFirstChunk() && dataUntilNextHeader != 0) {
GB.toast(getContext().getString(R.string.user_feedback_miband_activity_data_transfer,
DateTimeUtils.formatDurationHoursMinutes((totalDataToRead / 3), TimeUnit.MINUTES),
DateFormat.getDateTimeInstance().format(timestamp.getTime())), Toast.LENGTH_LONG, GB.INFO);
@ -132,16 +188,14 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
LOG.info("data to read until next header: " + dataUntilNextHeader + " len: " + (dataUntilNextHeader / 3) + " minute(s)");
LOG.info("TIMESTAMP: " + DateFormat.getDateTimeInstance().format(timestamp.getTime()).toString() + " magic byte: " + dataUntilNextHeader);
activityStruct.activityDataRemainingBytes = activityStruct.activityDataUntilNextHeader = dataUntilNextHeader;
activityStruct.activityDataTimestampToAck = (GregorianCalendar) timestamp.clone();
activityStruct.activityDataTimestampProgress = timestamp;
activityStruct.startNewBlock(timestamp, dataUntilNextHeader);
} else {
bufferActivityData(value);
}
LOG.debug("activity data: length: " + value.length + ", remaining bytes: " + activityStruct.activityDataRemainingBytes);
if (activityStruct.activityDataRemainingBytes == 0) {
if (activityStruct.isBlockFinished()) {
sendAckDataTransfer(activityStruct.activityDataTimestampToAck, activityStruct.activityDataUntilNextHeader);
}
}
@ -154,15 +208,11 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
* @param value
*/
private void bufferActivityData(byte[] value) {
if (activityStruct.hasRoomFor(value)) {
if (activityStruct.isValidData(value)) {
activityStruct.buffer(value);
if (activityStruct.activityDataRemainingBytes >= value.length) {
//I don't like this clause, but until we figure out why we get different data sometimes this should work
if (value.length == 20 || value.length == activityStruct.activityDataRemainingBytes) {
System.arraycopy(value, 0, activityStruct.activityDataHolder, activityStruct.activityDataHolderProgress, value.length);
activityStruct.activityDataHolderProgress += value.length;
activityStruct.activityDataRemainingBytes -= value.length;
if (this.activityDataHolderSize == activityStruct.activityDataHolderProgress) {
if (activityStruct.isBufferFull()) {
flushActivityDataHolder();
}
} else {
@ -190,22 +240,26 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
DBHandler dbHandler = null;
try {
dbHandler = GBApplication.acquireDB();
int minutes = 0;
try (SQLiteDatabase db = dbHandler.getWritableDatabase()) { // explicitly keep the db open while looping over the samples
int timestampInSeconds = (int) (activityStruct.activityDataTimestampProgress.getTimeInMillis() / 1000);
for (int i = 0; i < activityStruct.activityDataHolderProgress; i += 3) { //TODO: check if multiple of 3, if not something is wrong
category = activityStruct.activityDataHolder[i];
intensity = activityStruct.activityDataHolder[i + 1];
steps = activityStruct.activityDataHolder[i + 2];
dbHandler.addGBActivitySample(
(int) (activityStruct.activityDataTimestampProgress.getTimeInMillis() / 1000),
timestampInSeconds,
SampleProvider.PROVIDER_MIBAND,
(short) (intensity & 0xff),
(short) (steps & 0xff),
category);
activityStruct.activityDataTimestampProgress.add(Calendar.MINUTE, 1);
// next minute
minutes++;
timestampInSeconds += 60;
}
} finally {
activityStruct.activityDataHolderProgress = 0;
activityStruct.bufferFlushed(minutes);
}
} catch (Exception ex) {
GB.toast(getContext(), ex.getMessage(), Toast.LENGTH_LONG, GB.ERROR);
@ -255,7 +309,7 @@ public class FetchActivityOperation extends AbstractBTLEOperation<MiBandSupport>
builder.write(getCharacteristic(MiBandService.UUID_CHARACTERISTIC_CONTROL_POINT), ack);
builder.queue(getQueue());
// flush to the DB after sending the ACK
// flush to the DB after queueing the ACK
flushActivityDataHolder();
//The last data chunk sent by the miband has always length 0.

6
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/GB.java
View File

@ -339,4 +339,10 @@ public class GB {
public static GBEnvironment env() {
return environment;
}
public static void assertThat(boolean condition, String errorMessage) {
if (!condition) {
throw new AssertionError(errorMessage);
}
}
}