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Issue #2041 Improve exception handing in grid resources.

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Change-Id: I9edcb10da3ec9bfce16650cbf8c480af94dc6d39

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This commit is contained in:
Ben Steffensmeier 2013-06-04 16:04:26 -05:00
parent 7b8c0cd36c
commit 4fab8e711d
2 changed files with 100 additions and 12 deletions
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106
cave/com.raytheon.viz.grid/src/com/raytheon/viz/grid/rsc/general/GridDataRequestJob.java
View file

@ -45,7 +45,9 @@ import com.raytheon.uf.viz.core.exception.VizException;
*
* Date Ticket# Engineer Description
* ------------ ---------- ----------- --------------------------
* Mar 16, 2011 bsteffen Initial creation
* Mar 16, 2011 bsteffen Initial creation
* Jun 04, 2013 2041 bsteffen Improve exception handing in grid
* resources.
*
* </pre>
*
@ -65,6 +67,12 @@ class GridDataRequestJob extends Job {
public List<GeneralGridData> gridData;
public VizException exception;
// True only if exception has already been handled(i.e. the user has
// been notified.)
public boolean exceptionHandled = false;
public GridDataRequest(DataTime time, List<PluginDataObject> pdos) {
this.time = time;
if (pdos == null) {
@ -75,6 +83,10 @@ class GridDataRequestJob extends Job {
}
public boolean shouldRequest() {
return gridData == null && exception == null;
}
}
private AbstractGridResource<?> resource;
@ -97,14 +109,12 @@ class GridDataRequestJob extends Job {
synchronized (requests) {
requests.remove(request);
}
} else {
resource.issueRefresh();
}
resource.issueRefresh();
} catch (VizException e) {
synchronized (requests) {
requests.remove(request);
}
statusHandler.handle(Priority.PROBLEM, e.getLocalizedMessage(),
e);
request.exception = e;
resource.issueRefresh();
}
if (monitor.isCanceled()) {
break;
@ -116,7 +126,7 @@ class GridDataRequestJob extends Job {
protected GridDataRequest getNext() {
synchronized (requests) {
for (GridDataRequest request : requests) {
if (request.gridData == null) {
if (request.shouldRequest()) {
return request;
}
}
@ -126,8 +136,8 @@ class GridDataRequestJob extends Job {
public List<GeneralGridData> requestData(DataTime time,
List<PluginDataObject> pdos) {
GridDataRequest request = new GridDataRequest(time, pdos);
synchronized (requests) {
GridDataRequest request = new GridDataRequest(time, pdos);
Iterator<GridDataRequest> itr = requests.iterator();
while (itr.hasNext()) {
GridDataRequest r = itr.next();
@ -143,11 +153,87 @@ class GridDataRequestJob extends Job {
}
}
requests.add(0, request);
if (request.exception != null && !request.exceptionHandled) {
handleExceptions();
}
}
if (request.shouldRequest()) {
this.schedule();
}
this.schedule();
return null;
}
private void handleExceptions() {
List<GridDataRequest> failedRequests = new ArrayList<GridDataRequest>(
requests.size());
synchronized (requests) {
for (GridDataRequest request : requests) {
if (request.exception != null && !request.exceptionHandled) {
failedRequests.add(request);
}
}
}
if (failedRequests.isEmpty()) {
return;
}
String safeResourceName = "Grid Resource";
try {
safeResourceName = resource.getName();
} catch (Throwable e) {
// This means they just won't get
// as useful of a message.
statusHandler.handle(Priority.DEBUG, e.getLocalizedMessage(), e);
}
boolean multiple = failedRequests.size() > 1;
GridDataRequest request = failedRequests.get(0);
// Only log one message as a PROBLEM
statusHandler.handle(Priority.PROBLEM,
getFailureMessage(safeResourceName, request, multiple),
request.exception);
if (multiple) {
// Log all other messages as INFO so that if there are differences
// they will be in the log.
for (GridDataRequest r : failedRequests) {
statusHandler.handle(Priority.INFO,
getFailureMessage(safeResourceName, r, false),
r.exception);
r.exceptionHandled = true;
}
} else {
request.exceptionHandled = true;
}
}
/**
* Attempt to generate a pretty message to display to the user.
*
* @param resourceName
* the name of the resource
* @param request
* a failed request
* @param multiple
* whether this message should be for the current request or
* multiple frames.
* @return
*/
private String getFailureMessage(String resourceName,
GridDataRequest request, boolean multiple) {
StringBuilder message = new StringBuilder("Error requesting data for ");
message.append(resourceName);
if (multiple) {
message.append(" Multiple frames");
} else if (request.time != null) {
message.append(" ").append(request.time.getLegendString());
}
if (request.exception != null) {
message.append(": ");
message.append(request.exception.getLocalizedMessage());
}
return message.toString();
}
public void remove(DataTime time) {
synchronized (requests) {
Iterator<GridDataRequest> itr = requests.iterator();

6
cave/com.raytheon.viz.grid/src/com/raytheon/viz/grid/util/GridDataCubeAdapter.java
View file

@ -78,7 +78,9 @@ import com.raytheon.viz.grid.record.RequestableDataRecord;
* Date Ticket# Engineer Description
* ------------ ---------- ----------- --------------------------
* Mar 16, 2009 brockwoo Initial creation
* Nov 21, 2009 #3576 rjpeter Refactored use of DerivParamDesc.
* Nov 21, 2009 3576 rjpeter Refactored use of DerivParamDesc.
* Jun 04, 2013 2041 bsteffen Improve exception handing in grid
* resources.
* </pre>
*
* @author brockwoo
@ -367,7 +369,7 @@ public class GridDataCubeAdapter extends AbstractDataCubeAdapter {
records = getRecord(obj, requests);
}
} catch (VizException e) {
throw new VizDataCubeException(e);
throw new VizDataCubeException(e.getMessage(), e);
}
} else {
records = getRecord(obj, req, dataset);