Package org.epics.archiverappliance.retrieval.bpl

Class GetMatchingPVs

java.lang.Object

org.epics.archiverappliance.retrieval.bpl.GetMatchingPVs

All Implemented Interfaces:

BPLAction

public class GetMatchingPVs
extends Object
implements BPLAction

Get matching PV's for this appliance. Specify one of pv or regex. If both are specified, we only apply the pv wildcard. If neither is specified, we return an empty list.

1. pv - An optional argument that can contain a GLOB wildcard. We will return PVs that match this GLOB. For example, if pv=KLYS*, the server will return all PVs that start with the string KLYS.
2. regex - An optional argument that can contain a Java regex wildcard. We will return PVs that match this regex. For example, if pv=KLYS.*, the server will return all PVs that start with the string KLYS.
3. limit - An optional argument that specifies the number of matched PV's that are returned. If unspecified, we return 500 PV names. To get all the PV names, (potentially in the millions), set limit to -1.

Author:

mshankar

Constructor Summary

Constructors

Constructor	Description
GetMatchingPVs()

Method Summary

Modifier and Type	Method	Description
void	execute(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp, ConfigService configService)
static List<String>	getMatchingPVsInCluster(ConfigService configService, int limit, String nameToMatch, boolean includeExternalServers)	Get a list of PV's being archived in this cluster
static boolean	includeExternalServers(javax.servlet.http.HttpServletRequest req)	To prevent infinite loops and such, we can specify that we do not proxy to external servers for this data retrieval request.

Methods inherited from class java.lang.Object

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

Constructor Details

GetMatchingPVs

public GetMatchingPVs()

Method Details

execute

public void execute(javax.servlet.http.HttpServletRequest req,
 javax.servlet.http.HttpServletResponse resp,
 ConfigService configService)
             throws IOException

Specified by:

execute in interface BPLAction

Throws:

IOException

getMatchingPVsInCluster

public static List<String> getMatchingPVsInCluster(ConfigService configService,
 int limit,
 String nameToMatch,
 boolean includeExternalServers)
                                            throws IOException

Get a list of PV's being archived in this cluster

Parameters:

configService - ConfigService

limit - The numbers of PV's you want to limit the response to;

nameToMatch - A regex specifying the PV name pattern; globs should be converted to regex's

includeExternalServers - - Do you want to include external servers

Returns:

mathcing PVs in the cluster

Throws:

IOException -  

includeExternalServers

public static boolean includeExternalServers(javax.servlet.http.HttpServletRequest req)

To prevent infinite loops and such, we can specify that we do not proxy to external servers for this data retrieval request.

Parameters:

req - HttpServletRequest

Returns:

boolean True or False