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michele.ar
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package eu.dnetlib.msro.workflows.procs;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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import org.apache.commons.lang3.StringEscapeUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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import com.google.common.base.Throwables;
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import eu.dnetlib.miscutils.datetime.DateUtils;
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michele.ar
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import eu.dnetlib.msro.workflows.GraphNode;
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import eu.dnetlib.msro.workflows.ProcessStatus;
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import eu.dnetlib.msro.workflows.WorkflowsConstants;
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import eu.dnetlib.msro.workflows.nodes.AbstractParallelProcessNode;
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import eu.dnetlib.msro.workflows.util.NodeHelper;
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import eu.dnetlib.msro.workflows.util.NodeTokenCallback;
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import eu.dnetlib.services.async.AsyncMethodStatus;
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import eu.dnetlib.services.async.AsyncResponse;
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michele.ar
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/**
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* Created by michele on 26/11/15.
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*/
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@Component
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public class ProcessEngine {
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private static final Log log = LogFactory.getLog(ProcessEngine.class);
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@Autowired
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private NodeHelper nodeHelper;
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public void startProcess(final WorkflowProcess process) {
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log.info(process.getGraph());
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log.info("Starting workflow: " + process);
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final long now = DateUtils.now();
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process.setStatus(ProcessStatus.EXECUTING);
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process.setStartDate(now);
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process.setLastActivityDate(now);
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try {
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for (final GraphNode node : process.getGraph().startNodes()) {
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final AbstractParallelProcessNode pNode = nodeHelper.newProcessNode(node, process, process.getEnv());
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final Token token = new Token(node.getName(), newNodeTokenCallback(process, node));
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token.getEnv().addAttributes(process.getEnv().getAttributes());
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process.getTokens().add(token);
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pNode.execute(token);
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}
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} catch (final Throwable e) {
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log.error("WorkflowProcess node instantiation failed", e);
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process.setStatus(ProcessStatus.FAILURE);
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}
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}
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public void releaseToken(final WorkflowProcess process, final GraphNode oldGraphNode, final Token oldToken) {
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process.setLastActivityDate(DateUtils.now());
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try {
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for (final GraphNode node : process.getGraph().nextNodes(oldGraphNode, oldToken.getNextArc())) {
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log.info("Executing node: " + node.getName());
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if (node.isJoin() || node.isSucessNode()) {
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if (!process.getPausedJoinNodeTokens().containsKey(node.getName())) {
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process.getPausedJoinNodeTokens().put(node.getName(), new ArrayList<Token>());
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}
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final List<Token> list = process.getPausedJoinNodeTokens().get(node.getName());
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list.add(oldToken);
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if (list.size() == process.getGraph().getNumberOfIncomingArcs(node)) {
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final Token token = new Token(node.getName(), newNodeTokenCallback(process, node));
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token.getEnv().addAttributes(mergeEnvParams(list.toArray(new Token[list.size()])));
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final AbstractParallelProcessNode pNode = nodeHelper.newProcessNode(node, process, token.getEnv());
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process.getTokens().add(token);
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process.setLastActivityDate(DateUtils.now());
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if (node.isSucessNode()) {
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markAsCompleted(process, token);
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} else {
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pNode.execute(token);
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}
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}
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} else {
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final Token token = new Token(node.getName(), newNodeTokenCallback(process, node));
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token.getEnv().addAttributes(oldToken.getEnv().getAttributes());
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final AbstractParallelProcessNode pNode = nodeHelper.newProcessNode(node, process, token.getEnv());
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process.getTokens().add(token);
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process.setLastActivityDate(DateUtils.now());
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pNode.execute(token);
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}
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}
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} catch (final Throwable e) {
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log.error("WorkflowProcess node instantiation failed", e);
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process.setStatus(ProcessStatus.FAILURE);
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process.setError(e.getMessage());
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process.setErrorStacktrace(Throwables.getStackTraceAsString(e));
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process.setLastActivityDate(DateUtils.now());
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}
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}
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private NodeTokenCallback newNodeTokenCallback(final WorkflowProcess process, final GraphNode node) {
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return new NodeTokenCallback() {
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@Override
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public void onSuccess(final Token token) {
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releaseToken(process, node, token);
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}
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@Override
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public void onFail(final Token token) {
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completeProcess(process, token);
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}
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};
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}
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private Map<String, Object> mergeEnvParams(final Token... tokens) {
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final Map<String, Object> map = new HashMap<String, Object>();
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Arrays.stream(tokens).forEach(t -> map.putAll(t.getEnv().getAttributes()));
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return map;
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}
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private void markAsCompleted(final WorkflowProcess process, final Token token) {
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completeProcess(process, token);
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}
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private void completeProcess(final WorkflowProcess process, final Token token) {
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if (token.isActive()) {
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if (StringUtils.isNotBlank(token.getError())) {
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token.releaseAsFailed(token.getError());
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} else {
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token.releaseAsCompleted();
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}
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}
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final long now = token.getEndDate();
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process.setLastActivityDate(now);
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process.setEndDate(now);
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process.setStatus(token.isFailed() ? ProcessStatus.FAILURE : ProcessStatus.SUCCESS);
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process.setOutputParams(filterOutputParams(token.getEnv().getAttributes()));
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final AsyncResponse asyncResponse = new AsyncResponse();
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if (token.isFailed()) {
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asyncResponse.setStatus(AsyncMethodStatus.FAILED);
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process.setStatus(ProcessStatus.FAILURE);
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process.setError(token.getError());
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process.setErrorStacktrace(token.getErrorStackTrace());
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process.setLastActivityDate(DateUtils.now());
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process.getOutputParams().put(WorkflowsConstants.LOG_SYSTEM_ERROR, token.getError());
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process.getOutputParams().put(WorkflowsConstants.LOG_SYSTEM_ERROR_STACKTRACE, token.getErrorStackTrace());
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} else {
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asyncResponse.setStatus(AsyncMethodStatus.SUCCESS);
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}
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asyncResponse.prepareResponse(process.getOutputParams());
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process.getCallback().notify(asyncResponse);
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}
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private Map<String, String> filterOutputParams(final Map<String, Object> map) {
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return map == null ? new HashMap<>() : map.entrySet().stream()
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.filter(e -> StringUtils.isNotBlank(e.getKey()))
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.filter(e -> e.getValue() != null)
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.filter(e -> e.getKey().startsWith(WorkflowsConstants.DATASOURCE_PREFIX) || e.getKey().startsWith(WorkflowsConstants.MAIN_LOG_PREFIX))
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.collect(Collectors.toMap(
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e -> StringEscapeUtils.escapeXml11(e.getKey()),
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e -> StringEscapeUtils.escapeXml11(e.getValue().toString())));
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}
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}
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