com.inductiveautomation.ignition.gateway.sqltags.execution.history

Class NonCompressor

java.lang.Object

com.inductiveautomation.ignition.gateway.sqltags.execution.history.NonCompressor

All Implemented Interfaces:

ValueCompressor

public class NonCompressor
extends java.lang.Object
implements ValueCompressor

A compressor that doesn't actually compress. However, it still does something: it can be set to emit each time a value is added (useful for max life=1), or it will emit only when the value changes at all.

Constructor Summary

Constructors

Constructor and Description
NonCompressor(boolean emitEach)

Method Summary

Modifier and Type	Method and Description
java.util.List<TagValue>	flush() Tells the compressor to return any values it can.
java.util.List<TagValue>	putValue(TagValue value) Places a value into the compressor to be processed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NonCompressor

public NonCompressor(boolean emitEach)

Method Detail

putValue

public java.util.List<TagValue> putValue(TagValue value)

Description copied from interface: ValueCompressor

Places a value into the compressor to be processed. Any available processed values are returned. Will return an empty list if no values should be emitted (will not return null). Important: For performance reasons, the list returned may be the same object between calls. Therefore, it should not be held onto. The values should be utilized directly after calling this function.

Specified by:

putValue in interface ValueCompressor

Returns:

flush

public java.util.List<TagValue> flush()

Description copied from interface: ValueCompressor

Tells the compressor to return any values it can. Can be used before shutdown, or when the max-age has been reached in order to force values to be written. Important: For performance reasons, the list returned may be the same object between calls. Therefore, it should not be held onto. The values should be utilized directly after calling this function.

Specified by:

flush in interface ValueCompressor

Returns: