I’m attempting to find tagpaths in one of my tagproviders. With this code.
public void setup(GatewayContext gatewayContext) {
try {
provider=TagPathParser.parseSafe("[default]");
CompletableFuture<Results<NodeDescription>>node=context.getTagManager().getTagProvider("default").browseAsync(provider,bfilter.setRecursive(true));
Results <NodeDescription> nodeResult=node.get();
Collection<NodeDescription> nodeCollection=nodeResult.getResults();
Object[] nodenames=nodeCollection.toArray();
}catch(Exception e){
logger.info(Arrays.toString(nodenames));
logger.info("nodenames is: " + nodenames);
logger.info("nodeResult is: " + nodeResult);
logger.info("nodeCollection is: " + nodeCollection);
}
}
My results from browseAsync are all null.
INFO | jvm 1 | 2019/08/06 09:19:33 | I [t.d.c.GatewayHook ] [13:19:33]: null
INFO | jvm 1 | 2019/08/06 09:19:33 | I [t.d.c.GatewayHook ] [13:19:33]: nodenames is: null
INFO | jvm 1 | 2019/08/06 09:19:33 | I [t.d.c.GatewayHook ] [13:19:33]: nodeResult is: null
INFO | jvm 1 | 2019/08/06 09:19:33 | I [t.d.c.GatewayHook ] [13:19:33]: nodeCollection is: null
What’s the exception?
Btw, you’ve written your code such that you wouldn’t print anything if it succeeded.
Ah, and doing this during setup in your hook might be too early for the tag manager to be ready to use…
So I’ve move this to the startup(), but I get the same result.
try {
provider=TagPathParser.parseSafe("[default]");
node=context.getTagManager().getTagProvider("default").browseAsync(provider,bfilter.setRecursive(true));
nodeResult=node.get();
nodeCollection=nodeResult.getResults();
nodenames=nodeCollection.toArray();
logger.info(Arrays.toString(nodenames));
logger.info("nodenames is: " + nodenames);
logger.info("nodeResult is: " + nodeResult);
logger.info("nodeCollection is: " + nodeCollection);
}catch(Exception e){
logger.info("Exception triggered");
logger.info(Arrays.toString(nodenames));
logger.info("nodenames is: " + nodenames);
logger.info("nodeResult is: " + nodeResult);
logger.info("nodeCollection is: " + nodeCollection);
}
And I don’t get any Exception message from the wrapper file, but it seems to print what’s inside the catch statement anyway.
INFO | jvm 1 | 2019/08/06 10:07:04 | I [g.ModuleManager ] [14:07:04]: Starting up module 'tag.database.connection.TagDBV8' v1.0.0 (b0)... module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:07:04 | I [t.d.c.GatewayHook ] [14:07:04]: Exception triggered module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:07:04 | I [t.d.c.GatewayHook ] [14:07:04]: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:07:04 | I [t.d.c.GatewayHook ] [14:07:04]: nodenames is: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:07:04 | I [t.d.c.GatewayHook ] [14:07:04]: nodeResult is: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:07:04 | I [t.d.c.GatewayHook ] [14:07:04]: nodeCollection is: null module-name=TagDBV8 Ignition Module
You’re catching the exception, you need to print it out yourself.
Whoops. My bad. It’s a NullPointerException:
INFO | jvm 1 | 2019/08/06 10:22:11 | I [t.d.c.GatewayHook ] [14:22:11]: java.lang.NullPointerException module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:22:11 | I [t.d.c.GatewayHook ] [14:22:11]: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:22:11 | I [t.d.c.GatewayHook ] [14:22:11]: nodenames is: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:22:11 | I [t.d.c.GatewayHook ] [14:22:11]: nodeResult is: null module-name=TagDBV8 Ignition Module
INFO | jvm 1 | 2019/08/06 10:22:11 | I [t.d.c.GatewayHook ] [14:22:11]: nodeCollection is: null module-name=TagDBV8 Ignition Module
It seems so:
}catch(Exception e){
logger.info(e);
logger.info(context.getTagManager().getTagProvider("default"));
}
faults the module and returns:
INFO | jvm 1 | 2019/08/06 10:34:13 | java.lang.NullPointerException: null
INFO | jvm 1 | 2019/08/06 10:34:13 | at tag.database.connection.GatewayHook.startup(GatewayHook.java:68)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl$LoadedModule.startup(ModuleManagerImpl.java:2349)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.startupModule(ModuleManagerImpl.java:1166)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl$2.call(ModuleManagerImpl.java:733)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.executeModuleOperation(ModuleManagerImpl.java:905)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.installModuleInternal(ModuleManagerImpl.java:695)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl$InstallCommand.execute(ModuleManagerImpl.java:1851)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl$Receiver.receiveCall(ModuleManagerImpl.java:1801)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.redundancy.QueueableMessageReceiver.receiveCall(QueueableMessageReceiver.java:47)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.dispatchMessage(RedundancyManagerImpl.java:813)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl$ExecuteTask.run(RedundancyManagerImpl.java:849)
INFO | jvm 1 | 2019/08/06 10:34:13 | at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
INFO | jvm 1 | 2019/08/06 10:34:13 | at java.base/java.lang.Thread.run(Unknown Source)
I made some changes to my GatewayContext and now
logger.info(context.getTagManager().getTagProvider("default"));
returns
com.inductiveautomation.ignition.gateway.tags.TagProviderImpl@4722edc2
It seems now the only object returning null is my BrowseFilter (bfilter). Are there any examples that show how to correctly configure a BrowseFilter?