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Java > Open Source Codes > org > apache > excalibur > instrument > manager > InstrumentSampleFactory


1 /*
2
3  ============================================================================
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5  ============================================================================
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9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
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22     Alternately, this acknowledgment may appear in the software itself, if
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25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
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45  This software consists of voluntary contributions made by many individuals
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49 */

50 package org.apache.excalibur.instrument.manager;
51
52 import org.apache.excalibur.instrument.manager.interfaces.InstrumentManagerClient;
53
54 /**
55  * The InstrumentSample represents a single data sample in a ProfileDataSet.
56  * Access to InstrumentSamples are synchronized through the ProfileDataSet.
57  *
58  * @author <a HREF="mailto:leif@tanukisoftware.com">Leif Mortenson</a>
59  * @version CVS $Revision: 1.3 $ $Date: 2003/02/25 16:28:16 $
60  * @since 4.1
61  */

62 class InstrumentSampleFactory
63 {
64     /**
65      * A Profile Sample Type loaded in from a Configuration.
66      *
67      * @param instrumentProxy The InstrumentProxy which owns the
68      * InstrumentSample.
69      * @param type Type of the InstrumentSample to create.
70      * @param name The name of the new InstrumentSample.
71      * @param interval The sample interval of the new InstrumentSample.
72      * @param size The number of samples to store as history.
73      * @param description The description of the new InstrumentSample.
74      * @param lease Requested lease time in milliseconds. A value of 0 implies
75      * that the lease will never expire.
76      */

77     static InstrumentSample getInstrumentSample( InstrumentProxy instrumentProxy,
78                                                  int type,
79                                                  String JavaDoc name,
80                                                  long interval,
81                                                  int size,
82                                                  String JavaDoc description,
83                                                  long lease )
84     {
85         switch ( type )
86         {
87         case InstrumentManagerClient.INSTRUMENT_SAMPLE_TYPE_MAXIMUM:
88             return new MaximumValueInstrumentSample(
89                 instrumentProxy, name, interval, size, description, lease );
90             
91         case InstrumentManagerClient.INSTRUMENT_SAMPLE_TYPE_MINIMUM:
92             return new MinimumValueInstrumentSample(
93                 instrumentProxy, name, interval, size, description, lease );
94         
95         case InstrumentManagerClient.INSTRUMENT_SAMPLE_TYPE_MEAN:
96             return new MeanValueInstrumentSample(
97                 instrumentProxy, name, interval, size, description, lease );
98             
99         case InstrumentManagerClient.INSTRUMENT_SAMPLE_TYPE_COUNTER:
100             return new CounterInstrumentSample(
101                 instrumentProxy, name, interval, size, description, lease );
102             
103         default:
104             throw new IllegalArgumentException JavaDoc( "'" + type + "' is not a valid sample type." );
105         }
106     }
107 }
108
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