Examples with HapiMessage org.apache.nifi.hl7.hapi.HapiMessage used on opensource projects

Example 1 with HapiMessage

use of org.apache.nifi.hl7.hapi.HapiMessage in project nifi by apache.

the class TestHL7Query method createMessage.

private HL7Message createMessage(final String msgText) throws HL7Exception, IOException {
    final HapiContext hapiContext = new DefaultHapiContext();
    hapiContext.setValidationContext(ValidationContextFactory.noValidation());
    final PipeParser parser = hapiContext.getPipeParser();
    final Message message = parser.parse(msgText);
    return new HapiMessage(message);
}

Example 2 with HapiMessage

use of org.apache.nifi.hl7.hapi.HapiMessage in project nifi by apache.

the class RouteHL7 method onTrigger.

@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
    FlowFile flowFile = session.get();
    if (flowFile == null) {
        return;
    }
    final Charset charset = Charset.forName(context.getProperty(CHARACTER_SET).evaluateAttributeExpressions(flowFile).getValue());
    final byte[] buffer = new byte[(int) flowFile.getSize()];
    session.read(flowFile, new InputStreamCallback() {

        @Override
        public void process(final InputStream in) throws IOException {
            StreamUtils.fillBuffer(in, buffer);
        }
    });
    @SuppressWarnings("resource") final HapiContext hapiContext = new DefaultHapiContext();
    hapiContext.setValidationContext((ca.uhn.hl7v2.validation.ValidationContext) ValidationContextFactory.noValidation());
    final PipeParser parser = hapiContext.getPipeParser();
    final String hl7Text = new String(buffer, charset);
    final HL7Message message;
    try {
        final Message hapiMessage = parser.parse(hl7Text);
        message = new HapiMessage(hapiMessage);
    } catch (final Exception e) {
        getLogger().error("Failed to parse {} as HL7 due to {}; routing to failure", new Object[] { flowFile, e });
        session.transfer(flowFile, REL_FAILURE);
        return;
    }
    final Set<String> matchingRels = new HashSet<>();
    final Map<Relationship, HL7Query> queryMap = queries;
    for (final Map.Entry<Relationship, HL7Query> entry : queryMap.entrySet()) {
        final Relationship relationship = entry.getKey();
        final HL7Query query = entry.getValue();
        final QueryResult result = query.evaluate(message);
        if (result.isMatch()) {
            FlowFile clone = session.clone(flowFile);
            clone = session.putAttribute(clone, "RouteHL7.Route", relationship.getName());
            session.transfer(clone, relationship);
            session.getProvenanceReporter().route(clone, relationship);
            matchingRels.add(relationship.getName());
        }
    }
    session.transfer(flowFile, REL_ORIGINAL);
    getLogger().info("Routed a copy of {} to {} relationships: {}", new Object[] { flowFile, matchingRels.size(), matchingRels });
}