1 / 39

JavaIOC

Marty Kraimer EPICS Collaboration Meeting ICALEPCS October 13-14 2007. JavaIOC. Overview. Brief review of JavaIOC features types link, enum, and menu gone JavaIOC Data Model Generic structures and recordTypes Support – All support is generic PortDriver – JavaIOC version of asyn.

kamal
Download Presentation

JavaIOC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Marty Kraimer EPICS Collaboration Meeting ICALEPCS October 13-14 2007 JavaIOC

  2. ICALEPCS/EPICS Meeting Overview • Brief review of JavaIOC features • types link, enum, and menu gone • JavaIOC Data Model • Generic structures and recordTypes • Support – All support is generic • PortDriver – JavaIOC version of asyn

  3. ICALEPCS/EPICS Meeting JavaIOC Features • Rich Set of Data Types • Smart soft real-time Database • Record Instances can be processed. • Any field can optionally have support. • Connect to Hardware or other records. • Defines Data Model • General Purpose Clients can easily find data. • Generic Support can easily find data. • Rich set of record/structures and support.

  4. ICALEPCS/EPICS Meeting Implemented • PV (Process Variable) Database • XML Parsers: DBD and Record Instance • Record Processing/Scanning/Monitoring • Channel Access Local • COSYLab: CA Server for CSS/V3 clients • Generic record/structures and support • PortDriver – JavaIOC ASYN Support • SWTSHELL: GUI iocshell

  5. ICALEPCS/EPICS Meeting Not Implemented • Remote Channel Access • JavaIOC client <-> JavaIOC server • JavaIOC client <-> V3 server • VDCT: Visual Database Configuration Tool • Access security • Error logging • ??? • Lots to do!!

  6. ICALEPCS/EPICS Meeting PV Database • Field types • Primitive: all Java primitives except char • boolean, byte, short, int, long, float, double • string: implemented as a Java String • structure: has fields. Each field can be any type • array: has elementType which can be any type • Complex Structures fully supported • Introspection and Data interfaces:Provide access to any field.

  7. ICALEPCS/EPICS Meeting PV Introspection • Introspection Interfaces, i.e. no data • Field: Methods: getType, getFieldName, ... • Array: extends Field: Method: getElementType • Structure: extends Field • Methods: getFields, getStructureName • FieldFactory • Implements introspection interfaces • Can be extended but probably not necessary

  8. ICALEPCS/EPICS Meeting PV Data Interfaces • PVField: Base for data: Methods: getField, ... • PVBoolean,...,PVString : Methods: get,put • PVArray: Base for array data interfaces • PVBooleanArray,...,PVArrayArray : Methods get,put • PVStructure provides access to a structure. • PVRecord provides access to a record instance. • PVDataFactory • Default implementation. • Any PVField can be replaced. Often useful • ConvertFactory: Convert between data types

  9. ICALEPCS/EPICS Meeting XML Parsers • DBD - Database Definitions • structure • recordType - A top level structure • create – defines factory that replaces default data implementation. • support – defines a factory that implements support for a field. • DB - Record Instance • Macro Substitution and Include

  10. ICALEPCS/EPICS Meeting Types Removed • Previously javaIOC had types • link • enum • menu • link replaced by support for structure • enum and menu replaced by enumerated structure

  11. <structure name = "enumerated" createName = "enumerated" > <field name = "index" type = "int" /> <field name = "choice" type = "string" /> <field name = "choices" type = "array" elementType = "string" /> </structure> <create name = "enumerated" factoryName = "org.epics.ioc.create.EnumeratedFactory" /> Enumerated structure ICALEPCS/EPICS Meeting

  12. ICALEPCS/EPICS Meeting enumerated • An enumerated structure has fields • index – an int that selects one of choices • choice – a string that is the current choice • choices – an array of strings • The enumerated create • Replaces the default implementation • A put to index also changes choice • A put to choice also changes index

  13. An enumerated structure with default choices <structure name="alarmSeverity" createName = "enumerated" > <field name = "index" type = "int" /> <field name = "choice" type = "string" /> <field name = "choices" type = "array" elementType = "string" default = "none minor major invalid" /> </structure> alarmSeverity ICALEPCS/EPICS Meeting

  14. ICALEPCS/EPICS Meeting Java IOC Database • Has a set of record instances. • Each record and field is accessed via interfaces. • Each instance can be processed • Periodically scanned • Event scanned • Passively scanned: by client or other record • Factories: Data and Introspection

  15. ICALEPCS/EPICS Meeting PV Naming • EPICS pvname is <record>.field • JavaIOC is <record>.name.name. ... • name can be field name or a property • Some examples • <record>.value<record>.value.display.limit.low<powerSupply>.power.value<psArray>.supply[0].power.value

  16. ICALEPCS/EPICS Meeting JavaIOC Data Model • Simple: All related data appears together in a structure • Intended for Client tools and for Support • Field name can be a property name • A null structure(no fields and no support) is not a property. • If a structure has a field named “value” than every other field is a property unless it is a null structure.

  17. ICALEPCS/EPICS Meeting Finding Properties • PVField provides method findProperty • PVField findProperty(String fieldName); • Two examples for fieldName are: • “value” • “supply[0].power.value” • If pvField refers to the value field than • “display” • “display.limit.low”

  18. ICALEPCS/EPICS Meeting Generic structure/recordType • The JavaIOC now has DBD definitions for • Each primitive type • An array with a primitive element type • A structure and recordType for each • Record instances can • Just hold data • Be an input record, an output record, etc • The structure versions are for device records

  19. ICALEPCS/EPICS Meeting structure/recordType double • XML definitions on next two slides • Follows JavaIOC Data Model • recordType double is defined. It can: • Just holds data • Be an input or output or both • Be an analog input or analog output • Structure double is defined • It can be embeded in other recordTypes • Building block for “device” records

  20. <?xml version="1.0" ?> <DBDefinition> <field name = "value" type = "double" /> <field name = "alarm" type = "structure"/> <field name = "timeStamp" type = "structure" /> <field name = "input" type = "structure" /> <field name = "valueAlarm" type = "structure" /> <field name = "output" type = "structure" /> <field name = "display" type = "structure" /> <field name = "control" type = "structure" /> <field name = "history" type = "structure" /> </DBDefinition> doubleCommon.xml ICALEPCS/EPICS Meeting

  21. <?xml version="1.0" ?> <DBDefinition> <structure name = "double" supportName = "generic" > <include href = "doubleCommon.xml" /> </structure> <recordType name = "double" supportName = "generic" > <include href = "common.xml" /> <include href = "doubleCommon.xml" /> <field name = "supportArray" type = "array" elementType = "structure" supportName = "supportArray" /> </recordType> </DBDefinition> doubleRecord.xml ICALEPCS/EPICS Meeting

  22. ICALEPCS/EPICS Meeting Fields in doubleCommon • value has type double • All other fields are a null structure • A record instance can override • If not overridden than NOT a property • Following two slides show example • The definition of display • An example record instance

  23. <structure name = "display"> <field name = "description" type = "string" /> <field name = "format" type = "string" /> <field name = "units" type = "string" /> <field name = "resolution" type = "int" /> <field name = "limit" type = "structure" structureName = "doubleLimit" /> </structure> display.xml ICALEPCS/EPICS Meeting

  24. Note that example.value will have property display. <record name = "example" type = “double” > <display structureName = “display”> <units>volts</units> <limit> <low>0.0</low> <high>10.0</high> </limit> </display> </structure> record instance ICALEPCS/EPICS Meeting

  25. ICALEPCS/EPICS Meeting Support Overview • Implements record processing semantics • Each record instance has support • Each field of a record instance can optionally have support • Support should always be as generic as possible • Look for required fields and ignore all others • If required fields not found don’t start

  26. ICALEPCS/EPICS Meeting generic support • Is often the default support • Supports both recordType and structure • Algorithm • For each field that has support call it. • Each support must complete before support for the next field is called. • If any support does not report success don’t call any more support.

  27. ICALEPCS/EPICS Meeting Analog Input Example • The recordType is double • Input has structureName linearConvert • This has fields including value and input • The default support is generic • The following support is used • generic • linearConvertInput • pdrvInt32Input

  28. pdrvInt32Input puts input.value; linearConvertInput puts value. <record name = "ai" type = "double" > <input structureName = "linearConvertInput"> <input supportName = "pdrvInt32Input" structureName = "pdrvSupport"> <portName>aPortDriver</portName> <addr>0</addr> <timeout>.2</timeout> <size>20</size> </input> <linearConvert> <engUnitsLow>0.0</engUnitsLow> <engUnitsHigh>10.0</engUnitsHigh> </linearConvert> </input> </record> Analog Input Instance ICALEPCS/EPICS Meeting

  29. ICALEPCS/EPICS Meeting Analog Input Semantics • The generic support for ai calls the support for field input • The generic support for input • Calls the pdrvInt32Support • It puts a value into input.value • Calls the linearConvertInput support • It gets a value from input.value, converts it to engineering units, and puts the result into ai.value

  30. ICALEPCS/EPICS Meeting powerSupply Example • This is an example of a “device” record • Only new support is powerSupplyCurrent • It gets power.value and voltage.value • From these it computes the current • Puts the current into current.value

  31. <?xml version="1.0" ?> <DBDefinition> <field name = "power" type = "structure" structureName = "double" /> <field name = "voltage" type = "structure" structureName = "double" /> <field name = "current" type = "structure" structureName = "double" /> <field name = "alarm" type = "structure"/> <field name = "timeStamp" type = "structure" /> </DBDefinition> powerSupplyCommon.xml ICALEPCS/EPICS Meeting

  32. <?xml version="1.0" ?> <DBDefinition> <structure name = "powerSupply" supportName = "generic" > <include href = "powerSupplyCommon.xml" /> </structure> <recordType name = "powerSupply" supportName = "generic" > <include href = "common.xml" /> <include href = "powerSupplyCommon.xml" /> <field name = "supportArray" type = "array" elementType = "structure" supportName = "supportArray" /> </recordType> <support name = "powerSupplyCurrent" factoryName = "org.epics.ioc.support.PowerSupplyFactory" /> </DBDefinition> powerSupplyRecord.xml ICALEPCS/EPICS Meeting

  33. <record name = "ps" type = "powerSupply" > <voltage> <!-- do something to get voltage --> </voltage> <current> <input supportName = "powerSupplyCurrent" /> </current> </record> powerSupplyExample.xml ICALEPCS/EPICS Meeting

  34. The following defines a recordType that can hold an array of powerSupply <?xml version="1.0" ?> <DBDefinition> <recordType name = "powerSupplyArray" supportName = "generic" > <include href = "common.xml" /> <!-- instance must each element a powerSupply structure --> <field name = "supply" type = "array” elementType = “structure”/> <field name = "alarm" type = "structure"/> <field name = "timeStamp" type = "structure" /> </recordType> powerSupplyArray ICALEPCS/EPICS Meeting

  35. <record name = "psArray" type = "powerSupplyArray" > <supply capacity = “2”> <value structureName = “powerSupply” > <!-- do something to get voltage --> <current> <input supportName = "powerSupplyCurrent" /> </current> </value> <value structureName = “powerSupply” > <!-- do something to get voltage --> <current> <input supportName = "powerSupplyCurrent" /> </current> </value> </supply> </record> psArrayExample.xml ICALEPCS/EPICS Meeting

  36. ICALEPCS/EPICS Meeting Finding Fields • A V3 client could ask for • ai.value • ai.input.value • ps.power.value • ps.current.value • ps.voltage.value • psArray.supply[0].power.value • psArray.supply[1].current.value

  37. ICALEPCS/EPICS Meeting portDriver • Same functionality as asyn • AsynManager does not exist • Methods moved to User, Port, or Device • Easier to understand: Code and Doc • See javaDoc for org.epics.ioc.pdrv • NOT Ready for use • NO real drivers have been implemented • STREAMS not implemented • devGpib will not be implemented

  38. Interface User { public static final int REASON_SIGNAL = -1; User duplicateUser(QueueRequestCallback queueRequestCallback); Port connectPort(String portName); void disconnectPort(); Port getPort(); Device connectDevice(int addr); void disconnectDevice(); Device getDevice(); void queueRequest(QueuePriority queuePriority); void cancelRequest(); Status lockPort(); void unlockPort(); void setMessage(String message); String getMessage(); void setTimeout(double timeout); double getTimeout(); User.java ICALEPCS/EPICS Meeting

  39. void setDeviceDriverPvt(Object deviceDriverPvt); Object getDeviceDriverPvt(); void setUserPvt(Object userPvt); Object getUserPvt(); void setReason(int reason); int getReason(); void setAuxStatus(int auxStatus); int getAuxStatus(); void setInt(int value); int getInt(); void setDouble(double value); double getDouble(); void setString(String value); String getString(); } User.java continued ICALEPCS/EPICS Meeting

More Related