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1
19
20 package org.apache.excalibur.instrument.manager.http;
21
22 import java.io.IOException  ;
23 import java.io.PrintWriter ;
24 import java.util.Date ;
25 import java.util.Map ;
26
27 import org.apache.excalibur.instrument.manager.http.server.HTTPRedirect;
28 import org.apache.excalibur.instrument.manager.DefaultInstrumentManager;
29 import org.apache.excalibur.instrument.manager.InstrumentSampleDescriptor;
30 import org.apache.excalibur.instrument.manager.InstrumentSampleSnapshot;
31 import org.apache.excalibur.instrument.manager.NoSuchInstrumentSampleException;
32
33
39 public class HTMLSampleHandler
40 extends AbstractHTMLHandler
41 {
42
45
51 public HTMLSampleHandler( DefaultInstrumentManager manager,
52 InstrumentManagerHTTPConnector connector )
53 {
54 super( "/sample.html", manager, connector );
55 }
56
57
60
67 public void doGet( String path, Map parameters, PrintWriter out )
68 throws IOException
69 {
70 String name = getParameter( parameters, "name" );
71 InstrumentSampleDescriptor desc;
72 try
73 {
74 desc = getInstrumentManager().locateInstrumentSampleDescriptor( name );
75 }
76 catch ( NoSuchInstrumentSampleException e )
77 {
78 int pos = name.lastIndexOf( '.' );
80 if ( pos >= 0 )
81 {
82 throw new HTTPRedirect(
83 "instrument.html?name=" + urlEncode( name.substring( 0, pos ) ) );
84 }
85 else
86 {
87 throw new HTTPRedirect( "instrument-manager.html" );
88 }
89 }
90 String chart = getParameter( parameters, "chart", null );
91
92 InstrumentSampleSnapshot snapshot = desc.getSnapshot();
93
94 String type;
95 switch ( desc.getType() )
96 {
97 case DefaultInstrumentManager.INSTRUMENT_SAMPLE_TYPE_COUNTER:
98 type = "Counter";
99 break;
100
101 case DefaultInstrumentManager.INSTRUMENT_SAMPLE_TYPE_MAXIMUM:
102 type = "Max Value";
103 break;
104
105 case DefaultInstrumentManager.INSTRUMENT_SAMPLE_TYPE_MINIMUM:
106 type = "Min Value";
107 break;
108
109 case DefaultInstrumentManager.INSTRUMENT_SAMPLE_TYPE_MEAN:
110 type = "Mean Value";
111 break;
112
113 default:
114 type = "Unknown";
115 break;
116 }
117
118 out.println( "<html>" );
119 out.println( "<head><title>" + desc.getDescription() + "</title></head>" );
120 out.println( "<body>" );
121
122 breadCrumbs( out, desc, false );
123
124 out.println( "<h2>Instrument Sample</h2>" );
125 startTable( out );
126 tableRow( out, 0, "Name", desc.getName() );
127 tableRow( out, 0, "Description", desc.getDescription() );
128 tableRow( out, 0, "Type", type );
129 tableRow( out, 0, "Interval", desc.getInterval() + "ms." );
130 tableRow( out, 0, "Size", Integer.toString( desc.getSize() ) );
131 if ( desc.getLeaseExpirationTime() > 0 )
132 {
133 String renewUrl = "sample-lease.html?name=" + urlEncode( desc.getName() )
134 + ( chart == null ? "" : "&chart=true" ) + "&lease=";
135
136 String value = new Date ( desc.getLeaseExpirationTime() ).toString();
137
138 if ( !getConnector().isReadOnly() )
139 {
140 value = value + " (Renew <a HREF='" + renewUrl + "600000'>10min</a>, "
141 + "<a HREF='" + renewUrl + "3600000'>1hr</a>, "
142 + "<a HREF='" + renewUrl + "86400000'>1day</a>)";
143 }
144
145 if ( desc.getLeaseExpirationTime() - System.currentTimeMillis() < 300000 )
147 {
148 value = "<font color='ff0000'>" + value + "</font>";
149 }
150
151 tableRow( out, 0, "Expiration", value );
152 }
153 else
154 {
155 tableRow( out, 0, "Expiration", "Permanent" );
156 }
157 endTable( out );
158
159 if ( chart == null )
160 {
161 out.println( "<h2>Data Samples (<a HREF='sample.html?name="
162 + urlEncode( desc.getName() ) + "&chart=true'>Chart</a>)</h2>" );
163
164 startTable( out );
165 startTableHeaderRow( out );
166 tableHeaderCell( out, "Period" );
167 tableHeaderCell( out, "Value" );
168 endTableHeaderRow( out );
169 long time = snapshot.getTime();
170 int[] samples = snapshot.getSamples();
171 for ( int i = 0; i < samples.length; i++ )
172 {
173 startTableRow( out, i );
174 tableCell( out, new Date ( time ).toString() );
175 tableCellRight( out, Integer.toString( samples[samples.length - i - 1] ) );
176 endTableRow( out );
177
178 time -= snapshot.getInterval();
179 }
180 endTable( out );
181 }
182 else
183 {
184 out.println( "<h2>Data Samples (<a HREF='sample.html?name="
185 + urlEncode( desc.getName() ) + "'>Plain</a>)</h2>" );
186
187
199 out.println( "<SCRIPT LANGUAGE=\"JavaScript\">" );
200 out.println( "var timerId = 0;" );
201 out.println( "var timerInterval = 5000;" );
202 out.println( "function refreshChart() {" );
203 out.println( " document.chart.src=\"sample-chart.jpg?name=" + urlEncode( desc.getName() ) + "&time=\" + new Date().getTime();" );
205 out.println( "}" );
206 out.println( "function timerFired() {" );
207 out.println( " if (timerId) {" );
209 out.println( " clearTimeout(timerId);" );
210 out.println( " }" );
211 out.println( " timerId = setTimeout(\"timerFired()\", timerInterval)" );
212 out.println( " refreshChart();" );
213 out.println( "}" );
214 out.println( "function setRefresh(refresh) {" );
215 out.println( " timerInterval = refresh;" );
217 out.println( " timerFired();" );
218 out.println( "}" );
219 out.println( "function chartError() {" );
220 out.println( " clearTimeout(timerId);" );
222 out.println( " document.location=\"instrument.html?name=" + urlEncode( desc.getInstrumentDescriptor().getName() ) + "\";" );
223 out.println( "}" );
224 out.println( "</SCRIPT>" );
225
226 out.println( "<form>" );
227 startTable( out );
228 tableCell( out, "<img name='chart' SRC='sample-chart.jpg?name=" + urlEncode( desc.getName() )
232 + "&time=" + System.currentTimeMillis() + "' onError='javascript:chartError()'>" );
233 endTable( out );
234 out.println( "Refresh rate:" );
235 out.println( "<input type='button' value='No Refresh' onClick='javascript:clearTimeout(timerId)'>" );
236 out.println( "<input type='button' value='1 Second' onClick='javascript:setRefresh(1000)'>" );
237 out.println( "<input type='button' value='5 Seconds' onClick='javascript:setRefresh(5000)'>" );
238 out.println( "<input type='button' value='10 Seconds' onClick='javascript:setRefresh(10000)'>" );
239 out.println( "<input type='button' value='1 Minute' onClick='javascript:setRefresh(60000)'>" );
240 out.println( "<input type='button' value='Refresh Now' onClick='javascript:refreshChart()'>" );
241 out.println( "</form>" );
242 }
243
244 footer( out );
245
246 out.println( "</body>" );
247 out.println( "</html>" );
248 }
249
250
253 }
254
255 |
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