/**
* Creates a new UnsafeMetricDefinition
*
* @param globalId The global id of the metric
* @param timestamp The creation timestamp of this metric, or -1L if the metric is new, in which
* case the currnt time will be substituted
* @param name The metric name
* @param opaqueKey The opaque key
*/
public UnsafeMetricDefinition(long globalId, long timestamp, String name, byte[] opaqueKey) {
byte[] nameBytes = getBytes(name);
byte[] opaqueBytes = getBytes(opaqueKey);
int size = BASE_SIZE + nameBytes.length + opaqueBytes.length;
address[0] = UnsafeAdapter.allocateAlignedMemory(size);
UnsafeAdapter.registerForDeAlloc(this);
UnsafeAdapter.putByte(address[0], DELETE_FLAG);
UnsafeAdapter.putInt(address[0] + SIZE, size);
UnsafeAdapter.putLong(address[0] + ID, globalId);
UnsafeAdapter.putLong(
address[0] + TIMESTAMP, timestamp != -1L ? timestamp : System.currentTimeMillis());
UnsafeAdapter.putInt(address[0] + NAME_SIZE, nameBytes.length);
UnsafeAdapter.putInt(address[0] + OPAQUE_SIZE, opaqueBytes.length);
if (nameBytes.length > 0) {
UnsafeAdapter.copyMemory(
nameBytes,
UnsafeAdapter.BYTE_ARRAY_OFFSET,
null,
address[0] + NAME_BYTES,
nameBytes.length);
}
if (opaqueBytes.length > 0) {
UnsafeAdapter.copyMemory(
opaqueBytes,
UnsafeAdapter.BYTE_ARRAY_OFFSET,
null,
address[0] + NAME_BYTES + nameBytes.length,
opaqueBytes.length);
}
}
/**
* Updates the byte size of this metric
*
* @return the new byte size of this metric
*/
protected int updateByteSize() {
int size = BASE_SIZE + getNameSize() + getOpaqueSize();
UnsafeAdapter.putInt(address[0] + SIZE, size);
return size;
}