+ /**
+ * Schema builder that tries to build schema context from provided sources or biggest subset of it.
+ */
+ private final class RecursiveSchemaSetup implements Runnable {
+ private final DeviceSources deviceSources;
+ private final NetconfSessionCapabilities remoteSessionCapabilities;
+ private final NetconfDeviceRpc deviceRpc;
+ private final RemoteDeviceCommunicator<NetconfMessage> listener;
+
+ public RecursiveSchemaSetup(final DeviceSources deviceSources, final NetconfSessionCapabilities remoteSessionCapabilities, final NetconfDeviceRpc deviceRpc, final RemoteDeviceCommunicator<NetconfMessage> listener) {
+ this.deviceSources = deviceSources;
+ this.remoteSessionCapabilities = remoteSessionCapabilities;
+ this.deviceRpc = deviceRpc;
+ this.listener = listener;
+ }
+
+ @Override
+ public void run() {
+ setUpSchema(deviceSources.getRequiredSources());
+ }
+
+ /**
+ * Recursively build schema context, in case of success or final failure notify device
+ */
+ private void setUpSchema(final Collection<SourceIdentifier> requiredSources) {
+ logger.trace("{}: Trying to build schema context from {}", id, requiredSources);
+
+ // If no more sources, fail
+ if(requiredSources.isEmpty()) {
+ handleSalInitializationFailure(new IllegalStateException(id + ": No more sources for schema context"), listener);
+ return;
+ }
+
+ final CheckedFuture<SchemaContext, SchemaResolutionException> schemaBuilderFuture = schemaContextFactory.createSchemaContext(requiredSources);
+
+ final FutureCallback<SchemaContext> RecursiveSchemaBuilderCallback = new FutureCallback<SchemaContext>() {
+
+ @Override
+ public void onSuccess(final SchemaContext result) {
+ logger.debug("{}: Schema context built successfully from {}", id, requiredSources);
+ handleSalInitializationSuccess(result, remoteSessionCapabilities, deviceRpc);
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ // In case source missing, try without it
+ if (t instanceof MissingSchemaSourceException) {
+ final SourceIdentifier missingSource = ((MissingSchemaSourceException) t).getSourceId();
+ logger.warn("{}: Unable to build schema context, missing source {}, will reattempt without it", id, missingSource);
+ setUpSchema(stripMissingSource(requiredSources, missingSource));
+
+ // In case resolution error, try only with resolved sources
+ } else if (t instanceof SchemaResolutionException) {
+ // TODO check for infinite loop
+ final SchemaResolutionException resolutionException = (SchemaResolutionException) t;
+ logger.warn("{}: Unable to build schema context, unsatisfied imports {}, will reattempt with resolved only", id, resolutionException.getUnsatisfiedImports());
+ setUpSchema(resolutionException.getResolvedSources());
+ // unknown error, fail
+ } else {
+ handleSalInitializationFailure(t, listener);
+ }
+ }
+ };
+
+ Futures.addCallback(schemaBuilderFuture, RecursiveSchemaBuilderCallback);
+ }
+
+ private Collection<SourceIdentifier> stripMissingSource(final Collection<SourceIdentifier> requiredSources, final SourceIdentifier sIdToRemove) {
+ final LinkedList<SourceIdentifier> sourceIdentifiers = Lists.newLinkedList(requiredSources);
+ final boolean removed = sourceIdentifiers.remove(sIdToRemove);
+ Preconditions.checkState(removed, "{}: Trying to remove {} from {} failed", id, sIdToRemove, requiredSources);
+ return sourceIdentifiers;
+ }
+ }