Example usage for com.amazonaws.services.dynamodbv2.model ProvisionedThroughputDescription getNumberOfDecreasesToday

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2.model ProvisionedThroughputDescription getNumberOfDecreasesToday.

Prototype

public Long getNumberOfDecreasesToday() 

Source Link

Document

The number of provisioned throughput decreases for this table during this UTC calendar day.

Usage

From source file:com.cfelde.aws.ddb.management.TableThroughput.java

License:Open Source License

public void updateDownscaleCounter() {
    synchronized (lock) {
        try {//from   w  w w  . ja  v  a 2  s  . c o m
            ProvisionedThroughputDescription ptd = ddb.describeTable(new DescribeTableRequest(tableName))
                    .getTable().getProvisionedThroughput();

            downscaleCounter.set(ptd.getNumberOfDecreasesToday());

            LOG.info("Current scale down counter value on " + tableName + ": "
                    + ptd.getNumberOfDecreasesToday());
        } catch (Throwable t) {
            LOG.error("Exception in updateDownscaleCounter: " + t.getMessage(), t);
            exceptionCounter.incrementAndGet();
        }
    }
}

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From source file:com.cfelde.aws.ddb.management.TableThroughput.java

License:Open Source License

public void updateCapacity() {
    synchronized (lock) {
        try {/*from  www.  j  ava  2s  . c o  m*/
            if (lastTableChange.plusMinutes(3).isAfter(new DateTime()))
                return;

            long readCapacity = requestedReadCapacity.get();
            long writeCapacity = requestedWriteCapacity.get();

            if (readCapacity > maxReadLimit)
                readCapacity = maxReadLimit;
            if (readCapacity < minReadLimit)
                readCapacity = minReadLimit;

            if (writeCapacity > maxWriteLimit)
                writeCapacity = maxWriteLimit;
            if (writeCapacity < minWriteLimit)
                writeCapacity = minWriteLimit;

            ProvisionedThroughputDescription ptd = ddb.describeTable(new DescribeTableRequest(tableName))
                    .getTable().getProvisionedThroughput();

            downscaleCounter.set(ptd.getNumberOfDecreasesToday());

            final long currentReadCapacity = ptd.getReadCapacityUnits();
            final long currentWriteCapacity = ptd.getWriteCapacityUnits();

            // Make sure we don't try to scale up more than 100%
            if (readCapacity > currentReadCapacity * 2)
                readCapacity = currentReadCapacity * 2;

            if (writeCapacity > currentWriteCapacity * 2)
                writeCapacity = currentWriteCapacity * 2;

            if (!isDownscaleAllowed() && readCapacity < currentReadCapacity)
                readCapacity = currentReadCapacity;
            if (!isDownscaleAllowed() && writeCapacity < currentWriteCapacity)
                writeCapacity = currentWriteCapacity;

            // Check if no change
            if (readCapacity == currentReadCapacity && writeCapacity == currentWriteCapacity)
                return;

            /*
            if (readCapacity < currentReadCapacity || writeCapacity < currentWriteCapacity)
            downscaleAllowed.set(false);
            */

            ProvisionedThroughput throughput = new ProvisionedThroughput();
            throughput.withReadCapacityUnits(readCapacity);
            throughput.withWriteCapacityUnits(writeCapacity);

            UpdateTableRequest request = new UpdateTableRequest(tableName, throughput);

            LOG.info("Changing throughput on " + tableName + " to: reads: " + throughput.getReadCapacityUnits()
                    + ", writes: " + throughput.getWriteCapacityUnits());
            ddb.updateTable(request);

            lastTableChange = new DateTime();
        } catch (Throwable t) {
            LOG.error("Exception in updateCapacity: " + t.getMessage(), t);
            exceptionCounter.incrementAndGet();
        }
    }
}

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From source file:org.xmlsh.aws.util.AWSDDBCommand.java

License:BSD License

private void writeProvisionedThroughput(ProvisionedThroughputDescription provisionedThroughput)
        throws XMLStreamException {
    startElement("provisioned-throughput");
    attribute("last-decrease", provisionedThroughput.getLastDecreaseDateTime());
    attribute("last-increase", provisionedThroughput.getLastIncreaseDateTime());
    attribute("decreases-today", provisionedThroughput.getNumberOfDecreasesToday());
    attribute("read-capacity", provisionedThroughput.getReadCapacityUnits());
    attribute("write-capacity", provisionedThroughput.getWriteCapacityUnits());
    endElement();/*from   w w  w.  j av  a2s .  c om*/

}

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