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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.genprocessor;
import java.util.List;
import java.util.Set;
import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.processor.AbstractProcessor;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processor.ProcessSession;
import org.apache.nifi.processor.Relationship;
import org.apache.nifi.processor.exception.ProcessException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class DCAEProcessor extends AbstractProcessor {
static final Logger LOG = LoggerFactory.getLogger(DCAEProcessor.class);
// These are properties of the DCAE component that may be useful in the future..
abstract public String getName();
abstract public String getVersion();
abstract public String getComponentId();
abstract public String getComponentUrl();
public void ping() {
LOG.info("pong");
}
@Override
public void onTrigger(ProcessContext arg0, ProcessSession arg1) throws ProcessException {
LOG.info("Bang you triggered DCAEProcessor!");
return;
}
/**
* This function gets implemented by the ProcessorBuilder magic to build a new custom list of
* PropertyDescriptor every time. This is to be used by getSupportedPropertyDescriptors() which
* *should* only call this method once to initially fill the cache.
*
* @return list of PropertyDescriptor
*/
abstract protected List<PropertyDescriptor> buildSupportedPropertyDescriptors();
// Cache of PropertyDescriptors which should be static
private List<PropertyDescriptor> properties;
/**
* This is the critical Nifi function that is used to populate the configuration parameters
* in the UI and drive all the other configuration related functions in the ConfigurableComponent
* base class
*/
@Override
protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
if (this.properties == null) {
this.properties = buildSupportedPropertyDescriptors();
}
return this.properties;
}
abstract protected Set<Relationship> buildRelationships();
// Cache of Relationships which should be static
private Set<Relationship> relationships;
@Override
public Set<Relationship> getRelationships() {
if (this.relationships == null) {
this.relationships = buildRelationships();
}
return this.relationships;
}
}
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