105 lines
3.1 KiB
HTML
105 lines
3.1 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<head>
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<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
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<title>PvaClientMonitor</title>
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<link rel="stylesheet" type="text/css"
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href="http://epics-pvdata.sourceforge.net/base.css" />
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<link rel="stylesheet" type="text/css"
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href="http://epics-pvdata.sourceforge.net/epicsv4.css" />
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<style type="text/css">
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.about { margin-left: 3em; margin-right: 3em; font-size: .83em}
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table { margin-left: auto; margin-right: auto }
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/*]]>*/</style>
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<!-- Script that generates the Table of Contents -->
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<script type="text/javascript"
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src="http://epics-pvdata.sourceforge.net/script/tocgen.js">
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</script>
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</head>
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<body>
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<h1>PvaClientMonitor</h1>
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<h2>Overview</h2>
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<p>
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This provides an easier way to create a monitor on a channel than to use pvAccessCPP itself.
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It provides two main ways to create a monitor:
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</p>
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<h3>The client first creates a pvaClientChannel and then creates a monitor</h3>
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The client calls:
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<pre>
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static PvaClientMonitorPtr create(
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PvaClientPtr const &pvaClient,
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PvaClientChannelPtr const & pvaClientChannel,
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epics::pvData::PVStructurePtr const &pvRequest
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);
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where
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pvaClient
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The pvaClient.
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pvaClientChannel
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The pvaClientChannel that has already been created by the client.
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pvRequest
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The pvRequest for creating the monitor.
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</pre>
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With this method the monitor is created and started.
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This method blocks while the monitor is created.
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<h3>The client provides names for a channel and a provider</h3>
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The client calls:
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<pre>
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static PvaClientMonitorPtr create(
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PvaClientPtr const &pvaClient,
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std::string const & channelName,
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std::string const & providerName,
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std::string const & request,
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PvaClientChannelStateChangeRequesterPtr const & stateChangeRequester,
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PvaClientMonitorRequesterPtr const & monitorRequester
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);
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where
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pvaClient
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The pvaClient.
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channelName
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The name of the channel.
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providerName
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The name of the provider
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request
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The request for creating the monitor
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stateChangeRequester
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The client supplied state change requester.
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This will be called each time a state change for the channel occurs.
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monitorRequester
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The client supplied monitor requester.
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This is called each time a new monitor event is available.
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</pre>
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With this method a pvaChannel is created and after it connects a pvaMonitor is created and started.
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This method never blocks.
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</body>
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</html>
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