use of co.cask.cdap.etl.planner.ConditionBranches in project cdap by caskdata.
the class SmartWorkflow method configure.
@Override
protected void configure() {
setName(NAME);
setDescription(DESCRIPTION);
// set the pipeline spec as a property in case somebody like the UI wants to read it
Map<String, String> properties = new HashMap<>();
properties.put(Constants.PIPELINE_SPEC_KEY, GSON.toJson(spec));
setProperties(properties);
stageSpecs = new HashMap<>();
useSpark = engine == Engine.SPARK;
for (StageSpec stageSpec : spec.getStages()) {
stageSpecs.put(stageSpec.getName(), stageSpec);
String pluginType = stageSpec.getPlugin().getType();
if (SparkCompute.PLUGIN_TYPE.equals(pluginType) || SparkSink.PLUGIN_TYPE.equals(pluginType)) {
useSpark = true;
}
}
PipelinePlanner planner;
Set<String> actionTypes = ImmutableSet.of(Action.PLUGIN_TYPE, Constants.SPARK_PROGRAM_PLUGIN_TYPE);
Set<String> multiPortTypes = ImmutableSet.of(SplitterTransform.PLUGIN_TYPE);
if (useSpark) {
// if the pipeline uses spark, we don't need to break the pipeline up into phases, we can just have
// a single phase.
planner = new PipelinePlanner(supportedPluginTypes, ImmutableSet.<String>of(), ImmutableSet.<String>of(), actionTypes, multiPortTypes);
} else {
planner = new PipelinePlanner(supportedPluginTypes, ImmutableSet.of(BatchAggregator.PLUGIN_TYPE, BatchJoiner.PLUGIN_TYPE), ImmutableSet.of(SparkCompute.PLUGIN_TYPE, SparkSink.PLUGIN_TYPE), actionTypes, multiPortTypes);
}
plan = planner.plan(spec);
WorkflowProgramAdder programAdder = new TrunkProgramAdder(getConfigurer());
// single phase, just add the program directly
if (plan.getPhases().size() == 1) {
addProgram(plan.getPhases().keySet().iterator().next(), programAdder);
return;
}
// Dag classes don't allow a 'dag' without connections
if (plan.getPhaseConnections().isEmpty()) {
WorkflowProgramAdder fork = programAdder.fork();
for (String phaseName : plan.getPhases().keySet()) {
addProgram(phaseName, fork);
}
fork.join();
return;
}
dag = new ControlDag(plan.getPhaseConnections());
boolean dummyNodeAdded = false;
Map<String, ConditionBranches> conditionBranches = plan.getConditionPhaseBranches();
if (conditionBranches.isEmpty()) {
// after flattening, there is guaranteed to be just one source
dag.flatten();
} else if (!conditionBranches.keySet().containsAll(dag.getSources())) {
// Continue only if the conditon node is not the source of the dag, otherwise dag is already in the
// required form
Set<String> conditions = conditionBranches.keySet();
// flatten only the part of the dag starting from sources and ending in conditions/sinks.
Set<String> dagNodes = dag.accessibleFrom(dag.getSources(), Sets.union(dag.getSinks(), conditions));
Set<String> dagNodesWithoutCondition = Sets.difference(dagNodes, conditions);
Set<Connection> connections = new HashSet<>();
Deque<String> bfs = new LinkedList<>();
Set<String> sinks = new HashSet<>();
// If its a single phase without condition then no need to flatten
if (dagNodesWithoutCondition.size() > 1) {
Dag subDag;
try {
subDag = dag.createSubDag(dagNodesWithoutCondition);
} catch (IllegalArgumentException | DisjointConnectionsException e) {
// DisjointConnectionsException thrown when islands are created from the dagNodesWithoutCondition
// IllegalArgumentException thrown when connections are empty
// In both cases we need to add dummy node and create connected Dag
String dummyNode = "dummy";
dummyNodeAdded = true;
Set<Connection> subDagConnections = new HashSet<>();
for (String source : dag.getSources()) {
subDagConnections.add(new Connection(dummyNode, source));
}
Deque<String> subDagBFS = new LinkedList<>();
subDagBFS.addAll(dag.getSources());
while (subDagBFS.peek() != null) {
String node = subDagBFS.poll();
for (String output : dag.getNodeOutputs(node)) {
if (dagNodesWithoutCondition.contains(output)) {
subDagConnections.add(new Connection(node, output));
subDagBFS.add(output);
}
}
}
subDag = new Dag(subDagConnections);
}
ControlDag cdag = new ControlDag(subDag);
cdag.flatten();
// Add all connections from cdag
bfs.addAll(cdag.getSources());
while (bfs.peek() != null) {
String node = bfs.poll();
for (String output : cdag.getNodeOutputs(node)) {
connections.add(new Connection(node, output));
bfs.add(output);
}
}
sinks.addAll(cdag.getSinks());
} else {
sinks.addAll(dagNodesWithoutCondition);
}
// Add back the existing condition nodes and corresponding conditions
Set<String> conditionsFromDag = Sets.intersection(dagNodes, conditions);
for (String condition : conditionsFromDag) {
connections.add(new Connection(sinks.iterator().next(), condition));
}
bfs.addAll(Sets.intersection(dagNodes, conditions));
while (bfs.peek() != null) {
String node = bfs.poll();
ConditionBranches branches = conditionBranches.get(node);
if (branches == null) {
// not a condition node. add outputs
for (String output : dag.getNodeOutputs(node)) {
connections.add(new Connection(node, output));
bfs.add(output);
}
} else {
// condition node
for (Boolean condition : Arrays.asList(true, false)) {
String phase = condition ? branches.getTrueOutput() : branches.getFalseOutput();
if (phase == null) {
continue;
}
connections.add(new Connection(node, phase, condition));
bfs.add(phase);
}
}
}
dag = new ControlDag(connections);
}
if (dummyNodeAdded) {
WorkflowProgramAdder fork = programAdder.fork();
String dummyNode = dag.getSources().iterator().next();
for (String output : dag.getNodeOutputs(dummyNode)) {
// need to make sure we don't call also() if this is the final branch
if (!addBranchPrograms(output, fork)) {
fork = fork.also();
}
}
} else {
String start = dag.getSources().iterator().next();
addPrograms(start, programAdder);
}
}
use of co.cask.cdap.etl.planner.ConditionBranches in project cdap by caskdata.
the class SmartWorkflow method addPrograms.
private void addPrograms(String node, WorkflowProgramAdder programAdder) {
programAdder = addProgram(node, programAdder);
Set<String> outputs = dag.getNodeOutputs(node);
if (outputs.isEmpty()) {
return;
}
ConditionBranches branches = plan.getConditionPhaseBranches().get(node);
if (branches != null) {
// This is condition
addCondition(programAdder, branches);
} else {
// if this is a fork
if (outputs.size() > 1) {
WorkflowProgramAdder fork = programAdder.fork();
for (String output : outputs) {
// need to make sure we don't call also() if this is the final branch
if (!addBranchPrograms(output, fork)) {
fork = fork.also();
}
}
} else {
addPrograms(outputs.iterator().next(), programAdder);
}
}
}
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