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package eu.dnetlib.msro.workflows.procs;
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import java.util.*;
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import java.util.stream.Collectors;
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import com.google.common.base.Throwables;
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import eu.dnetlib.enabling.locators.UniqueServiceLocator;
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import eu.dnetlib.miscutils.datetime.DateUtils;
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import eu.dnetlib.msro.logging.DnetLogger;
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import eu.dnetlib.msro.notification.EmailDispatcher;
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import eu.dnetlib.msro.workflows.graph.GraphNode;
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import eu.dnetlib.msro.workflows.nodes.ProcessNode;
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import eu.dnetlib.msro.workflows.procs.WorkflowProcess.Status;
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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.msro.workflows.util.WorkflowsConstants;
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import eu.dnetlib.rmi.enabling.ISRegistryService;
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import org.antlr.stringtemplate.StringTemplate;
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import org.apache.commons.io.IOUtils;
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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.beans.factory.annotation.Required;
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/**
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* Created by michele on 26/11/15.
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*/
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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 UniqueServiceLocator serviceLocator;
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private NodeHelper nodeHelper;
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private DnetLogger dnetLogger;
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private EmailDispatcher emailDispatcher;
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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(WorkflowProcess.Status.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 ProcessNode pNode = this.nodeHelper.newProcessNode(node, process);
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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(WorkflowProcess.Status.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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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 ProcessNode pNode = this.nodeHelper.newProcessNode(node, process);
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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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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 ProcessNode pNode = this.nodeHelper.newProcessNode(node, process);
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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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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(WorkflowProcess.Status.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.release();
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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() ? WorkflowProcess.Status.FAILURE : WorkflowProcess.Status.SUCCESS);
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if (token.isFailed()) {
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process.setStatus(Status.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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}
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if (process.getCallback() != null) {
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if (token.isFailed()) {
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process.getCallback().onFail();
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} else {
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process.getCallback().onSuccess();
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}
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}
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process.setOutputParams(filterOutputParams(token.getEnv().getAttributes()));
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final String profileId = process.getProfileId();
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if (!process.isTemplate() && StringUtils.isNotBlank(profileId)) {
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try {
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final String template = IOUtils.toString(getClass().getResourceAsStream("/eu/dnetlib/msro/workflows/templates/workflow_status.xml.st"));
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final StringTemplate st = new StringTemplate(template);
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st.setAttribute("procId", StringEscapeUtils.escapeXml11(process.getId()));
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st.setAttribute("date", StringEscapeUtils.escapeXml11(DateUtils.calculate_ISO8601(now)));
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st.setAttribute("params", process.getOutputParams());
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if (process.getStatus() == Status.FAILURE) {
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st.setAttribute("error", StringEscapeUtils.escapeXml11(process.getError()));
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}
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this.serviceLocator.getService(ISRegistryService.class).updateProfileNode(profileId, "//STATUS", st.toString());
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} catch (final Exception e) {
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log.error("Error updating workflow profile: " + profileId, e);
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process.setStatus(WorkflowProcess.Status.FAILURE);
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process.setError("Error updating workflow profile: " + profileId);
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process.setErrorStacktrace(Throwables.getStackTraceAsString(e));
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}
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}
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this.dnetLogger.newLogMessage()
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.addDetails(process.getOutputParams())
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.addDetail(WorkflowsConstants.LOG_WF_NAME, process.getName())
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.addDetail(WorkflowsConstants.LOG_WF_FAMILY, process.getFamily())
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.addDetail(WorkflowsConstants.LOG_WF_PRIORITY, "" + process.getPriority())
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.addDetail(WorkflowsConstants.LOG_WF_PROCESS_ID, process.getId())
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.addDetail(WorkflowsConstants.LOG_WF_PROCESS_STATUS, process.getStatus().toString())
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.addDetail(WorkflowsConstants.LOG_WF_PROCESS_START_DATE, Long.toString(process.getStartDate()))
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.addDetail(WorkflowsConstants.LOG_WF_PROCESS_END_DATE, Long.toString(process.getEndDate()))
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.addDetail(WorkflowsConstants.LOG_WF_PROFILE_ID, process.isTemplate() ? null : process.getProfileId())
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.addDetail(WorkflowsConstants.LOG_WF_PROFILE_TEMPLATE_ID, process.isTemplate() ? process.getProfileId() : null)
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.addDetail(WorkflowsConstants.LOG_DATASOURCE_ID, process.getDsId())
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.addDetail(WorkflowsConstants.LOG_DATASOURCE_NAME, process.getDsName())
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.addDetail(WorkflowsConstants.LOG_DATASOURCE_INTERFACE, process.getDsInterface())
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.addDetail(WorkflowsConstants.LOG_SYSTEM_ERROR, process.getError())
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.addDetail(WorkflowsConstants.LOG_SYSTEM_ERROR_STACKTRACE, process.getErrorStacktrace())
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.flush();
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this.emailDispatcher.sendMails(process);
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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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public DnetLogger getDnetLogger() {
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return this.dnetLogger;
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}
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@Required
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public void setDnetLogger(final DnetLogger dnetLogger) {
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this.dnetLogger = dnetLogger;
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}
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public NodeHelper getNodeHelper() {
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return this.nodeHelper;
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}
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@Required
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public void setNodeHelper(final NodeHelper nodeHelper) {
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this.nodeHelper = nodeHelper;
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}
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public EmailDispatcher getEmailDispatcher() {
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return this.emailDispatcher;
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}
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@Required
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public void setEmailDispatcher(final EmailDispatcher emailDispatcher) {
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this.emailDispatcher = emailDispatcher;
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}
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}
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