package com.thinkbiganalytics.nifi.rest.model.flow;
/*-
* #%L
* thinkbig-nifi-flow-visitor-model
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Lists;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Serializable;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
/**
* Object in a NifiFlow that has pointers to all its sources (parents) and children (destinations)
*/
@JsonIgnoreProperties(ignoreUnknown = true)
public class NifiFlowProcessor implements Serializable {
private static final Logger log = LoggerFactory.getLogger(NifiFlowProcessor.class);
@JsonProperty("id")
private String id;
@JsonProperty("name")
private String name;
@JsonProperty("type")
private String type;
private String parentGroupId;
private boolean isFailure;
private boolean isEnd;
private String flowId;
private NifiFlowProcessGroup processGroup;
@JsonIgnore
private Set<NifiFlowProcessor> sources; //parents
@JsonIgnore
private Set<NifiFlowProcessor> destinations; //children
private Set<String> sourceIds;
private Set<String> destinationIds;
private Set<NiFiFlowProcessorConnection> sourceConnectionIds;
private Set<NiFiFlowProcessorConnection> destinationConnectionIds;
public NifiFlowProcessor() {
}
public NifiFlowProcessor(@JsonProperty("id") String id, @JsonProperty("name") String name, @JsonProperty("type") String type) {
this.id = id;
this.name = name;
this.type = type;
}
/**
* Return the processor id
*
* @return the processor id
*/
public String getId() {
return id;
}
/**
* set the processor id
*
* @param id the processor id
*/
public void setId(String id) {
this.id = id;
}
/**
* Return the processor name
*
* @return the processor name
*/
public String getName() {
return name;
}
/**
* set the processor name
*
* @param name the processor name
*/
public void setName(String name) {
this.name = name;
}
/**
* Return the set of destinations coming from this processor
*
* @return the set of destination processors
*/
public Set<NifiFlowProcessor> getDestinations() {
if (destinations == null) {
destinations = new HashSet<>();
}
return destinations;
}
/**
* set the destination processors
*
* @param destinations the destination processors
*/
public void setDestinations(Set<NifiFlowProcessor> destinations) {
this.destinations = destinations;
}
/**
* Return the source processors
*
* @return the source processors
*/
public Set<NifiFlowProcessor> getSources() {
if (sources == null) {
sources = new HashSet<>();
}
return sources;
}
/**
* set the source processors
*
* @param sources the source processors
*/
public void setSources(Set<NifiFlowProcessor> sources) {
this.sources = sources;
}
/**
* Return the group associated with this processor
*
* @return the group
*/
public NifiFlowProcessGroup getProcessGroup() {
return processGroup;
}
/**
* Set the group associated with this processor
*
* @param processGroup the group
*/
public void setProcessGroup(NifiFlowProcessGroup processGroup) {
this.processGroup = processGroup;
}
/**
* Return the set of ids that are incoming source processors
*
* @return the set of ids that are incoming source processors
*/
public Set<String> getSourceIds() {
if (sourceIds == null) {
sourceIds = new HashSet<>();
}
return sourceIds;
}
/**
* set the set of ids that are incoming source processors
*
* @param sourceIds the set of ids that are incoming source processors
*/
public void setSourceIds(Set<String> sourceIds) {
this.sourceIds = sourceIds;
}
/**
* Return the set of ids that are destination processors
*
* @return the set of ids that are destination processors
*/
public Set<String> getDestinationIds() {
if (destinationIds == null) {
destinationIds = new HashSet<>();
}
return destinationIds;
}
/**
* set the set of ids that are destination processors
*
* @param destinationIds the set of ids that are destination processors
*/
public void setDestinationIds(Set<String> destinationIds) {
this.destinationIds = destinationIds;
}
/**
* Return the set of this processors destination ids, and all of its children destination ids
*
* @return the set of this processors destination ids, and all of its children destination ids
*/
public Set<String> getAllDestinationIds() {
Set<String> destinationIds = new HashSet<>();
destinationIds.addAll(getDestinationIds());
for (NifiFlowProcessor destination : getDestinations()) {
destinationIds.addAll(destination.getAllDestinationIds());
}
return destinationIds;
}
/**
* Return the set of connection identifiers for the incoming connections
*
* @return the set of connection identifiers for the incoming connections
*/
public Set<NiFiFlowProcessorConnection> getSourceConnectionIds() {
if (sourceConnectionIds == null) {
sourceConnectionIds = new HashSet<>();
}
return sourceConnectionIds;
}
/**
* set the set of connection identifiers for the incoming connections
*
* @param sourceConnectionIds the set of connection identifiers for the incoming connections
*/
public void setSourceConnectionIds(Set<NiFiFlowProcessorConnection> sourceConnectionIds) {
this.sourceConnectionIds = sourceConnectionIds;
}
/**
* Return the set of outgoing destination connection ids
*
* @return the set of outgoing destination connection ids
*/
public Set<NiFiFlowProcessorConnection> getDestinationConnectionIds() {
if (destinationConnectionIds == null) {
destinationConnectionIds = new HashSet<>();
}
return destinationConnectionIds;
}
/**
* set the set of outgoing destination connection ids
*
* @param destinationConnectionIds the set of outgoing destination connection ids
*/
public void setDestinationConnectionIds(Set<NiFiFlowProcessorConnection> destinationConnectionIds) {
this.destinationConnectionIds = destinationConnectionIds;
}
/**
* prints the flow id for the processor and its destinations
*/
public void print() {
print(0, null);
}
/**
* prints the flow id for the processor and its destinations
*/
public void print(Integer level, Set<String> printed) {
log.info(flowId + ", " + level + ". " + getName());
System.out.println(level + ". " + getName());
printed = printed == null ? new HashSet<>() : printed;
printed.add(this.getId());
Integer nextLevel = level + 1;
for (NifiFlowProcessor child : getDestinations()) {
if (!child.containsDestination(this) && !child.containsDestination(child) && !child.equals(this) && !printed.contains(child.getId())) {
child.print(nextLevel, printed);
printed.add(child.getId());
}
}
}
/**
* Sort the destination processors so the flow id generation will be the same each time a similar flow of the same template is walked
*
* @return the sorted destinations
*/
public List<NifiFlowProcessor> getSortedDestinations() {
if (destinations == null) {
destinations = new HashSet<>();
}
List<NifiFlowProcessor> list = Lists.newArrayList(destinations);
Collections.sort(list, new NifiFlowProcessor.FlowIdComparator());
return list;
}
/**
* Assign a flow identifier to the processor. Flow ids are an attempt to assign a id relative the the location of the processor in the graph as it is walked so different instances of the same
* flow/template can relate given processors to each other
*
* @param flowId the id representing its placement in the graph
* @return the assigned numeric id
*/
public Integer assignFlowIds(Integer flowId) {
flowId++;
setFlowId(flowId + "__" + StringUtils.substringAfterLast(this.type, "."));
Set<String> printed = new HashSet<>();
printed.add(this.getId());
for (NifiFlowProcessor child : getSortedDestinations()) {
if (StringUtils.isBlank(child.getFlowId()) && !child.containsDestination(this) && !child.containsDestination(child) && !child.equals(this) && !printed.contains(child.getId())) {
flowId = child.assignFlowIds(flowId);
printed.add(child.getId());
}
}
return flowId;
}
/**
* Count the number of distinct destination processor nodes
*
* @return the number of distinct destination processor nodes
*/
public Integer countNodes() {
return countNodes(null);
}
/**
* Count the number of distinct destination processor nodes
*
* @param printed a set containing those nodes that were already printed
* @return the number of distinct destination processor nodes
*/
public Integer countNodes(Set<String> printed) {
Integer count = getDestinations().size();
printed = printed == null ? new HashSet<>() : printed;
printed.add(this.getId());
for (NifiFlowProcessor child : getDestinations()) {
if (!child.containsDestination(this) && !child.containsDestination(child) && !child.equals(this) && !printed
.contains(child.getId())) {
count += child.countNodes(printed);
printed.add(child.getId());
}
}
return count;
}
/**
* Check to see if the supplied processor is part of this processors graph
*
* @param parent a processor
* @return {@code true} if the processor is already part of this destination set, {@code false} if the processor is not part of the destination set
*/
public boolean containsDestination(NifiFlowProcessor parent) {
final String thisId = getId();
final String parentId = parent.getId();
return getDestinations().stream().anyMatch(processor -> processor.getId().equalsIgnoreCase(thisId) || processor.getId()
.equalsIgnoreCase(parentId));
}
/**
* Return the unique flow id for this processor
*
* @return the flow if
*/
public String getFlowId() {
return flowId;
}
/**
* set the flow id for the processor
*
* @param flowId the flow id
*/
public void setFlowId(String flowId) {
this.flowId = flowId;
}
/**
* Return the type of processor
*
* @return the type of processor
*/
public String getType() {
return type;
}
/**
* set the type of processor
*
* @param type the type of processor
*/
public void setType(String type) {
this.type = type;
}
/**
* check if there are any destinations
*
* @return {@code true} if this is a ending processor with no more connections, {@code false} if there are other processors connected to this
*/
public boolean isLeaf() {
return getDestinationIds().isEmpty();
}
/**
* check if there are any sources
*
* @return {@code true} if this is a starting processor with no incoming connections, {@code false} if it is connected to other incoming processors
*/
public boolean isStart() {
return getSourceIds().isEmpty();
}
/**
* check to see if its a leaf processor. same check as the {@link this#isLeaf()}, but supplied when building the object in the {@link
* com.thinkbiganalytics.nifi.rest.model.visitor.NifiFlowBuilder}
*/
public boolean isEnd() {
return isEnd;
}
/**
* set the processor as being a leaf/ending processor, supplied when building the object in the {@link com.thinkbiganalytics.nifi.rest.model.visitor.NifiFlowBuilder}
*/
public void setIsEnd(boolean isEnd) {
this.isEnd = isEnd;
}
/**
* return the process group id for this processor
*
* @return the process group id
*/
public String getParentGroupId() {
return parentGroupId;
}
/**
* set the process group id
*
* @param parentGroupId the process group id
*/
public void setParentGroupId(String parentGroupId) {
this.parentGroupId = parentGroupId;
}
@Override
public int hashCode() {
return Objects.hash(id);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
NifiFlowProcessor that = (NifiFlowProcessor) o;
return Objects.equals(id, that.id);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("NifiFlowProcessor{");
sb.append("id='").append(id).append('\'');
sb.append(", name='").append(name).append('\'');
sb.append('}');
return sb.toString();
}
public static class FlowIdComparator implements Comparator<NifiFlowProcessor> {
@Override
public int compare(NifiFlowProcessor o1, NifiFlowProcessor o2) {
int compare = 0;
if (o1 == null && o2 == null) {
compare = 0;
} else if (o1 == null && o2 != null) {
compare = -1;
} else if (o1 != null && o2 == null) {
compare = 1;
} else if (o1.getName() != null && o2.getName() != null) {
compare = o1.getName().compareTo(o2.getName());
}
if (compare == 0 && o1.getType() != null && o2.getType() != null) {
compare = o1.getType().compareTo(o2.getType());
}
return compare;
}
}
}