| 98 |
|
// get the list of components |
| 99 |
|
String componentList = System.getProperty("uk.ac.ukc.iscream.ComponentList"); |
| 100 |
|
StringTokenizer st = new StringTokenizer(componentList, ";"); |
| 101 |
< |
ArrayList componentsToStart = new ArrayList(); |
| 101 |
> |
_componentsToStart = new ArrayList(); |
| 102 |
|
|
| 103 |
|
// this could be done using reflection |
| 104 |
|
// but..well..we don't ;-p |
| 121 |
|
// note the passing of the Filter's name in its constructor |
| 122 |
|
} else if (componentName.equalsIgnoreCase("filter")) { |
| 123 |
|
component = new uk.ac.ukc.iscream.filter.FilterMain(filterName); |
| 124 |
+ |
} else if (componentName.equalsIgnoreCase("client")) { |
| 125 |
+ |
component = new uk.ac.ukc.iscream.client.ClientMain(); |
| 126 |
|
} |
| 127 |
|
// ### Add new component constructors in the above section! ### |
| 128 |
|
|
| 129 |
|
// build the list of components to start |
| 130 |
|
if (component != null) { |
| 131 |
< |
componentsToStart.add(component); |
| 131 |
> |
_componentsToStart.add(component); |
| 132 |
|
} else { |
| 133 |
|
System.err.println(toString + ": WARNING unsupported component not started"); |
| 134 |
|
} |
| 135 |
|
} |
| 136 |
|
|
| 137 |
< |
// now we try and start the beast up |
| 136 |
< |
boolean tryAgain = true; |
| 137 |
< |
Component component = null; |
| 137 |
> |
|
| 138 |
|
|
| 139 |
|
// get the value for timeout |
| 140 |
< |
int startTimeout; |
| 140 |
> |
|
| 141 |
> |
String confTimeout = null; |
| 142 |
|
try { |
| 143 |
< |
String confTimeout = System.getProperty("uk.ac.ukc.iscream.ComponentTimeout") |
| 144 |
< |
startTimeout = Integer.parseInt(confTimeout); |
| 143 |
> |
confTimeout = System.getProperty("uk.ac.ukc.iscream.ComponentTimeout"); |
| 144 |
> |
confTimeout.trim(); |
| 145 |
> |
_startTimeout = Integer.parseInt(confTimeout); |
| 146 |
|
} catch (NumberFormatException e) { |
| 147 |
< |
startTimeout = DEFAULT_COMPONENT_START_TIMEOUT; |
| 147 |
> |
_startTimeout = DEFAULT_COMPONENT_START_TIMEOUT; |
| 148 |
|
System.err.println(toString + ": unable to read uk.ac.ukc.iscream.ComponentTimeout value (" + confTimeout + "), using default!"); |
| 149 |
|
} |
| 150 |
< |
System.out.println(toString + ": using component start timeout of " + startTimeout + " seconds"); |
| 150 |
> |
System.out.println(toString + ": using component start timeout of " + _startTimeout + " seconds"); |
| 151 |
|
|
| 152 |
+ |
// startup the system components |
| 153 |
+ |
startUp(); |
| 154 |
+ |
|
| 155 |
+ |
// block on the ORB...in time, management functionality can be placed here. |
| 156 |
+ |
// if we detect a CORBA communication error, we'll restart all the components. |
| 157 |
+ |
while(true) { |
| 158 |
+ |
try { |
| 159 |
+ |
refman.getORB().run(); |
| 160 |
+ |
} catch (org.omg.CORBA.COMM_FAILURE e) { |
| 161 |
+ |
System.out.println(toString + ": WARNING CORBA communications failure - " + e.getMessage()); |
| 162 |
+ |
System.out.println(toString + ": WARNING CORBA connections have been lost - attempting to restart!"); |
| 163 |
+ |
} |
| 164 |
+ |
startUp(); |
| 165 |
+ |
} |
| 166 |
+ |
} |
| 167 |
+ |
|
| 168 |
+ |
/** |
| 169 |
+ |
* Starts the components as obtained from the configuration. |
| 170 |
+ |
* This method calls the start() methods on all the components. |
| 171 |
+ |
* If a component fails to start due to a CORBA communication |
| 172 |
+ |
* problem, then it catches this and tries to start it again |
| 173 |
+ |
* according to uk.ac.ukc.iscream.ComponentTimeout time. |
| 174 |
+ |
* |
| 175 |
+ |
* If the server dies and CORBA connections are lost, this method |
| 176 |
+ |
* is called again. |
| 177 |
+ |
*/ |
| 178 |
+ |
private static void startUp() { |
| 179 |
+ |
// now we try and start the beast up |
| 180 |
+ |
boolean tryAgain = true; |
| 181 |
+ |
Component component = null; |
| 182 |
+ |
|
| 183 |
|
// keep trying until we've started all the components. |
| 184 |
|
// maybe add support for a limited number of retries |
| 185 |
|
while(tryAgain) { |
| 186 |
< |
Iterator i = componentsToStart.iterator(); |
| 186 |
> |
Iterator i = _componentsToStart.iterator(); |
| 187 |
|
ArrayList failedComponents = new ArrayList(); |
| 188 |
|
// go through all the components |
| 189 |
|
while(i.hasNext()) { |
| 217 |
|
// if we had some failed components that we can retry |
| 218 |
|
if (failedComponents.size() > 0) { |
| 219 |
|
System.err.println(toString + ": WARNING One or more components failed to start correctly."); |
| 220 |
< |
System.err.println(toString + ": Will try again in " + startTimeout + " seconds"); |
| 220 |
> |
System.err.println(toString + ": Will try again in " + _startTimeout + " seconds"); |
| 221 |
|
|
| 222 |
|
// our list is now the failed list |
| 223 |
< |
componentsToStart = failedComponents; |
| 223 |
> |
_componentsToStart = failedComponents; |
| 224 |
|
|
| 225 |
|
// sleep for a given timeout |
| 226 |
|
try { |
| 227 |
< |
Thread.sleep(startTimeout * 1000); |
| 227 |
> |
Thread.sleep(_startTimeout * 1000); |
| 228 |
|
} catch (InterruptedException e) { |
| 229 |
|
// we're not bothered |
| 230 |
|
} |
| 236 |
|
} |
| 237 |
|
|
| 238 |
|
System.out.println(toString + ": running"); |
| 239 |
+ |
} |
| 240 |
|
|
| 207 |
– |
// block on the ORB...in time, management functionality can be placed here. |
| 208 |
– |
refman.getORB().run(); |
| 209 |
– |
} |
| 210 |
– |
|
| 241 |
|
/** |
| 242 |
|
* A simple method to print the usage of this class. |
| 243 |
|
* It never returns, but instead exits to the system |
| 266 |
|
//---ATTRIBUTES--- |
| 267 |
|
|
| 268 |
|
//---STATIC ATTRIBUTES--- |
| 269 |
+ |
|
| 270 |
+ |
private static ArrayList _componentsToStart; |
| 271 |
+ |
private static int _startTimeout = 0; |
| 272 |
|
|
| 273 |
|
} |
