Package org.epics.archiverappliance.retrieval.mimeresponses

Class JSONResponse

java.lang.Object

org.epics.archiverappliance.retrieval.mimeresponses.JSONResponse

All Implemented Interfaces:

EventConsumer, MimeResponse

public class JSONResponse
extends Object
implements MimeResponse

Author:

mshankar Sends the event data as a JSON response. The response is a array of PV elements, each PV has a meta and data section. The data section has timestamp in epoch seconds and the value

Field Summary

Fields inherited from interface org.epics.archiverappliance.retrieval.mimeresponses.MimeResponse

ACCESS_CONTROL_ALLOW_ORIGIN, CONTENT_TYPE, PROXIED_HEADERS

Constructor Summary

Constructors

Constructor	Description
JSONResponse()

Method Summary

Modifier and Type	Method	Description
void	close()
void	consumeEvent(Event e)
HashMap<String,String>	getExtraHeaders()	Get extra headers that are to be added to the response.
void	processingPV(BasicContext retrievalContext, String pv, Timestamp start, Timestamp end, EventStreamDesc streamDesc)	Called when we swich to a new PV.
void	setOutputStream(OutputStream os)
void	swicthingToStream(EventStream strm)

Methods inherited from class java.lang.Object

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

Constructor Detail

JSONResponse

public JSONResponse()

Method Detail

consumeEvent

public void consumeEvent(Event e)
                  throws Exception

Specified by:

consumeEvent in interface EventConsumer

Throws:

Exception

setOutputStream

public void setOutputStream(OutputStream os)

Specified by:

setOutputStream in interface MimeResponse

close

public void close()

Specified by:

close in interface MimeResponse

processingPV

public void processingPV(BasicContext retrievalContext,
                         String pv,
                         Timestamp start,
                         Timestamp end,
                         EventStreamDesc streamDesc)

Description copied from interface: MimeResponse

Called when we swich to a new PV.

Specified by:

processingPV in interface MimeResponse

pv - The name of PV

start - Timestamp

end - Timestamp

streamDesc - Could be null if we have no data in first store we hit.

swicthingToStream

public void swicthingToStream(EventStream strm)

Specified by:

swicthingToStream in interface MimeResponse

getExtraHeaders

public HashMap<String,String> getExtraHeaders()

Description copied from interface: MimeResponse

Get extra headers that are to be added to the response. For this to work correctly in a clustered environment, you'll need to add the header to the set of proxiedHeaders below

Specified by:

getExtraHeaders in interface MimeResponse

Returns:

HashMap ExtraHeaders