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ExperimentManagerService.java
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ExperimentManagerService.java
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/*******************************************************************************
* Copyright (c) 2018, 2021 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License 2.0 which
* accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services;
import static org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services.EndpointConstants.EXP_UUID;
import static org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services.EndpointConstants.INVALID_PARAMETERS;
import static org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services.EndpointConstants.MISSING_PARAMETERS;
import static org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.services.EndpointConstants.NO_SUCH_EXPERIMENT;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.UUID;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import org.apache.commons.io.FileUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.resources.IResourceVisitor;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.Activator;
import org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.ExperimentQueryParameters;
import org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.views.QueryParameters;
import org.eclipse.tracecompass.internal.provisional.tmf.core.model.annotations.TraceAnnotationProvider;
import org.eclipse.tracecompass.tmf.core.TmfCommonConstants;
import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.project.model.TmfTraceType;
import org.eclipse.tracecompass.tmf.core.signal.TmfSignalManager;
import org.eclipse.tracecompass.tmf.core.signal.TmfTraceClosedSignal;
import org.eclipse.tracecompass.tmf.core.signal.TmfTraceOpenedSignal;
import org.eclipse.tracecompass.tmf.core.trace.ITmfContext;
import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
import org.eclipse.tracecompass.tmf.core.trace.experiment.TmfExperiment;
import com.google.common.collect.HashMultiset;
import com.google.common.collect.Lists;
import com.google.common.collect.Multiset;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.media.ArraySchema;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.parameters.RequestBody;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.tags.Tag;
/**
* Service to manage experiments
*
* @author Loic Prieur-Drevon
*/
@SuppressWarnings("restriction")
@Path("/experiments")
@Tag(name = EndpointConstants.EXP)
public class ExperimentManagerService {
private static final Map<UUID, List<UUID>> TRACE_UUIDS = Collections.synchronizedMap(new HashMap<>());
private static final Map<UUID, IResource> EXPERIMENT_RESOURCES = Collections.synchronizedMap(initExperimentResources());
private static final Map<UUID, TmfExperiment> EXPERIMENTS = Collections.synchronizedMap(new HashMap<>());
private static final Map<UUID, TraceAnnotationProvider> TRACE_ANNOTATION_PROVIDERS = Collections.synchronizedMap(new HashMap<>());
private static final String EXPERIMENTS_FOLDER = "Experiments"; //$NON-NLS-1$
private static final String TRACES_FOLDER = "Traces"; //$NON-NLS-1$
private static final String SUFFIX = "_exp"; //$NON-NLS-1$
/**
* Getter for the list of experiments from the trace manager
*
* @return The set of opened experiments
*/
@GET
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Get the list of experiments on the server", responses = {
@ApiResponse(responseCode = "200", description = "Returns a list of experiments", content = @Content(array = @ArraySchema(schema = @Schema(implementation = org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.Experiment.class))))
})
public Response getExperiments() {
synchronized (EXPERIMENT_RESOURCES) {
List<Experiment> experiments = Lists.transform(new ArrayList<>(EXPERIMENT_RESOURCES.entrySet()), e -> {
UUID expUUID = e.getKey();
TmfExperiment experiment = EXPERIMENTS.get(expUUID);
if (experiment != null) {
return Experiment.from(experiment, expUUID);
}
IResource experimentResource = e.getValue();
return Experiment.from(experimentResource, expUUID);
});
return Response.ok(experiments).build();
}
}
private static Map<UUID, IResource> initExperimentResources() {
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IProject project = root.getProject(TmfCommonConstants.DEFAULT_TRACE_PROJECT_NAME);
Map<UUID, IResource> experimentResources = new HashMap<>();
try {
project.refreshLocal(IResource.DEPTH_INFINITE, null);
IFolder experimentsFolder = project.getFolder(EXPERIMENTS_FOLDER);
experimentsFolder.accept((IResourceVisitor) resource -> {
if (resource.equals(experimentsFolder)) {
return true;
}
if (resource instanceof IFolder) {
UUID expUUID = UUID.nameUUIDFromBytes(Objects.requireNonNull(resource.getName().getBytes(Charset.defaultCharset())));
experimentResources.put(expUUID, resource);
List<UUID> traceUUIDs = getTraceUUIDs((IFolder) resource);
TRACE_UUIDS.put(expUUID, traceUUIDs);
}
return false;
}, IResource.DEPTH_ONE, IResource.NONE);
} catch (CoreException e) {
}
return experimentResources;
}
private static List<UUID> getTraceUUIDs(IFolder experimentResource) throws CoreException {
List<UUID> traceUUIDs = new ArrayList<>();
experimentResource.accept(resource -> {
if (resource instanceof IFile) {
IPath path = resource.getProjectRelativePath().makeRelativeTo(experimentResource.getProjectRelativePath());
IResource traceResource = experimentResource.getProject().getFolder(TRACES_FOLDER).findMember(path);
if (traceResource != null) {
traceUUIDs.add(TraceManagerService.getTraceUUID(traceResource));
}
return false;
}
return true;
});
return traceUUIDs;
}
/**
* Getter for an experiment by {@link UUID}.
*
* @param expUUID
* UUID of the experiment to search for
*
* @return The experiment with the queried {@link UUID} if it exists.
*/
@GET
@Path("/{expUUID}")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Get the model object for an experiment", responses = {
@ApiResponse(responseCode = "200", description = "Return the experiment model", content = @Content(schema = @Schema(implementation = org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.Experiment.class))),
@ApiResponse(responseCode = "404", description = NO_SUCH_EXPERIMENT, content = @Content(schema = @Schema(implementation = String.class)))
})
public Response getExperiment(@Parameter(description = EXP_UUID) @PathParam("expUUID") UUID expUUID) {
TmfExperiment experiment = getExperimentByUUID(expUUID);
if (experiment != null) {
return Response.ok(Experiment.from(experiment, expUUID)).build();
}
return Response.status(Status.NOT_FOUND).build();
}
/**
* Delete an experiment by {@link UUID}.
*
* @param expUUID
* UUID of the experiment to delete
*
* @return The experiment with the queried {@link UUID} if it exists.
*/
@DELETE
@Path("/{expUUID}")
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Remove an experiment from the server", responses = {
@ApiResponse(responseCode = "200", description = "The trace was successfully deleted, return the deleted experiment.", content = @Content(schema = @Schema(implementation = org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.Experiment.class))),
@ApiResponse(responseCode = "404", description = NO_SUCH_EXPERIMENT, content = @Content(schema = @Schema(implementation = String.class)))
})
public Response deleteExperiment(@Parameter(description = EXP_UUID) @PathParam("expUUID") UUID expUUID) {
IResource resource = EXPERIMENT_RESOURCES.remove(expUUID);
if (resource == null) {
return Response.status(Status.NOT_FOUND).build();
}
Experiment experimentModel = Experiment.from(resource, expUUID);
TmfExperiment experiment = EXPERIMENTS.remove(expUUID);
if (experiment != null) {
TmfSignalManager.dispatchSignal(new TmfTraceClosedSignal(this, experiment));
experiment.dispose();
}
TRACE_ANNOTATION_PROVIDERS.remove(expUUID);
TRACE_UUIDS.remove(expUUID);
boolean deleteResources = true;
synchronized (EXPERIMENTS) {
for (TmfExperiment e : EXPERIMENTS.values()) {
if (resource.equals(e.getResource())) {
deleteResources = false;
break;
}
}
}
if (deleteResources) {
try {
// Delete supplementary files and folders
File supplFolder = new File(resource.getPersistentProperty(TmfCommonConstants.TRACE_SUPPLEMENTARY_FOLDER));
FileUtils.cleanDirectory(supplFolder);
supplFolder.delete();
// Delete experiment resource
resource.delete(true, null);
// Refresh the workspace
resource.getProject().refreshLocal(Integer.MAX_VALUE, null);
} catch (CoreException | IOException e) {
Activator.getInstance().logError("Failed to delete experiment", e); //$NON-NLS-1$
}
}
return Response.ok(experimentModel).build();
}
/**
* Post a new experiment encapsulating the traces from the list of
* {@link UUID}s.
*
* @param queryParameters
* Parameters to post a experiment as described by
* {@link QueryParameters}
* - name -> name for the experiment.
* - traces -> List of UUID strings of the traces to add to the experiment
*
* @return no content response if one of the trace {@link UUID}s does not map to
* any trace.
*/
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@Operation(summary = "Create a new experiment on the server", responses = {
@ApiResponse(responseCode = "200", description = "The experiment was successfully created", content = @Content(schema = @Schema(implementation = org.eclipse.tracecompass.incubator.internal.trace.server.jersey.rest.core.model.Experiment.class))),
@ApiResponse(responseCode = "204", description = "The experiment has at least one trace which hasn't been created yet", content = @Content(schema = @Schema(implementation = String.class))),
@ApiResponse(responseCode = "400", description = INVALID_PARAMETERS, content = @Content(schema = @Schema(implementation = String.class))),
@ApiResponse(responseCode = "409", description = "The experiment (name) already exists and both differ", content = @Content(schema = @Schema(implementation = String.class))),
@ApiResponse(responseCode = "500", description = "Internal trace-server error while trying to post experiment", content = @Content(schema = @Schema(implementation = String.class)))
})
public Response postExperiment(@RequestBody(content = {
@Content(schema = @Schema(implementation = ExperimentQueryParameters.class))
}, required = true) QueryParameters queryParameters) {
Map<String, Object> parameters = queryParameters.getParameters();
if (parameters == null) {
return Response.status(Status.BAD_REQUEST).entity(MISSING_PARAMETERS).build();
}
Object nameObj = parameters.get("name"); //$NON-NLS-1$
Object tracesObj = parameters.get("traces"); //$NON-NLS-1$
if (!(nameObj instanceof String) || !(tracesObj instanceof List<?>)) {
return Response.status(Status.BAD_REQUEST).build();
}
String name = (String) nameObj;
List<UUID> traceUUIDs = new ArrayList<>();
List<IResource> traceResources = new ArrayList<>();
for (Object uuidObj : (List<?>) tracesObj) {
if (!(uuidObj instanceof String)) {
return Response.status(Status.BAD_REQUEST).build();
}
UUID uuid = UUID.fromString((String) uuidObj);
IResource traceResource = TraceManagerService.getTraceResource(uuid);
if (traceResource == null) {
// The trace should have been created first
return Response.noContent().build();
}
traceResources.add(traceResource);
traceUUIDs.add(uuid);
}
UUID expUUID = UUID.nameUUIDFromBytes(Objects.requireNonNull(name.getBytes(Charset.defaultCharset())));
IFolder resource;
try {
resource = getExperimentResource(name);
if (resource.exists()) {
// An experiment with that name has already been created
Multiset<IResource> oldTraceResources = HashMultiset.create(getTraceResources(resource));
Multiset<IResource> newTraceResources = HashMultiset.create(traceResources);
if (!oldTraceResources.equals(newTraceResources)) {
// It's a different experiment, return a conflict
TmfExperiment oldExperiment = new TmfExperiment(ITmfEvent.class, resource.getLocation().toOSString(), new ITmfTrace[0], TmfExperiment.DEFAULT_INDEX_PAGE_SIZE, resource);
Experiment entity = Experiment.from(oldExperiment, expUUID);
oldExperiment.dispose();
return Response.status(Status.CONFLICT).entity(entity).build();
}
// It's the same experiment, check if it is opened already
TmfExperiment experiment = EXPERIMENTS.get(expUUID);
if (experiment != null) {
// It's already opened, return it
return Response.ok(Experiment.from(experiment, expUUID)).build();
}
// It's not opened, continue below to instantiate it
} else {
// It's a new experiment, create the experiment resources
createExperiment(resource, traceResources);
}
} catch (CoreException e) {
return Response.status(Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
}
TRACE_UUIDS.put(expUUID, traceUUIDs);
EXPERIMENT_RESOURCES.put(expUUID, resource);
TmfExperiment experiment = createExperimentInstance(expUUID);
if (experiment == null) {
return Response.status(Status.INTERNAL_SERVER_ERROR).entity("Failed to instantiate experiment").build(); //$NON-NLS-1$
}
return Response.ok(Experiment.from(experiment, expUUID)).build();
}
private static @Nullable TmfExperiment createExperimentInstance(UUID expUUID) {
List<UUID> traceUUIDs = TRACE_UUIDS.get(expUUID);
IResource resource = EXPERIMENT_RESOURCES.get(expUUID);
if (traceUUIDs == null || resource == null) {
return null;
}
// Create and set the supplementary folder
createSupplementaryFolder(resource);
// Instantiate the experiment and return it
ITmfTrace[] traces = Lists.transform(traceUUIDs, uuid -> TraceManagerService.createTraceInstance(uuid)).toArray(new ITmfTrace[0]);
// Determine cache size for experiments
int cacheSize = Integer.MAX_VALUE;
for (ITmfTrace trace : traces) {
cacheSize = Math.min(cacheSize, trace.getCacheSize());
}
TmfExperiment experiment = new TmfExperiment(ITmfEvent.class, resource.getLocation().toOSString(), traces, cacheSize, resource);
experiment.indexTrace(false);
// read first event to make sure start time is initialized
ITmfContext ctx = experiment.seekEvent(0);
experiment.getNext(ctx);
ctx.dispose();
TmfSignalManager.dispatchSignal(new TmfTraceOpenedSignal(ExperimentManagerService.class, experiment, null));
EXPERIMENTS.put(expUUID, experiment);
TRACE_ANNOTATION_PROVIDERS.put(expUUID, new TraceAnnotationProvider(experiment));
return experiment;
}
/**
* Gets the Eclipse resource from the experiment name.
*
* @param name
* the experiment name
* @return The Eclipse resource
*
* @throws CoreException
* if an error occurs
*/
private static IFolder getExperimentResource(String name) throws CoreException {
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IProject project = root.getProject(TmfCommonConstants.DEFAULT_TRACE_PROJECT_NAME);
project.refreshLocal(IResource.DEPTH_INFINITE, null);
IFolder experimentsFolder = project.getFolder(EXPERIMENTS_FOLDER);
return experimentsFolder.getFolder(name);
}
private static List<IResource> getTraceResources(IFolder folder) {
final List<IResource> list = new ArrayList<>();
final IFolder tracesFolder = folder.getProject().getFolder(TRACES_FOLDER);
try {
folder.accept(new IResourceProxyVisitor() {
@Override
public boolean visit(IResourceProxy resource) throws CoreException {
if (resource.getType() == IResource.FILE) {
IResource traceResourceUnderExperiment = resource.requestResource();
IPath relativePath = traceResourceUnderExperiment.getProjectRelativePath().makeRelativeTo(folder.getProjectRelativePath());
IResource traceResource = tracesFolder.findMember(relativePath);
if (traceResource != null) {
list.add(traceResource);
}
return false;
}
return true;
}
}, IResource.NONE);
} catch (CoreException e) {
}
list.sort(Comparator.comparing(resource -> resource.getFullPath().toString()));
return list;
}
private static void createExperiment(IFolder folder, List<IResource> traceResources) throws CoreException {
// create the experiment folder resource
createFolder(folder);
// add the traces
for (IResource traceResource : traceResources) {
addTrace(folder, traceResource);
}
// set the experiment type
folder.setPersistentProperty(TmfCommonConstants.TRACETYPE, TmfTraceType.DEFAULT_EXPERIMENT_TYPE);
}
private static void addTrace(IFolder folder, IResource traceResource) throws CoreException {
/*
* Create an empty file to represent the experiment trace. The file's element
* path relative to the experiment resource corresponds to the trace's element
* path relative to the Traces folder.
*/
IPath relativePath = traceResource.getProjectRelativePath().removeFirstSegments(1);
IFile file = folder.getFile(relativePath);
createFolder((IFolder) file.getParent());
file.create(new ByteArrayInputStream(new byte[0]), false, new NullProgressMonitor());
file.setPersistentProperty(TmfCommonConstants.TRACETYPE, TmfTraceType.getTraceTypeId(traceResource));
}
private static void createSupplementaryFolder(IResource experimentResource) {
try {
IFolder supplRootFolder = experimentResource.getProject().getFolder(TmfCommonConstants.TRACE_SUPPLEMENTARY_FOLDER_NAME);
IFolder supplFolder = supplRootFolder.getFolder(experimentResource.getName() + SUFFIX);
createFolder(supplFolder);
experimentResource.setPersistentProperty(TmfCommonConstants.TRACE_SUPPLEMENTARY_FOLDER, supplFolder.getLocation().toOSString());
} catch (CoreException e) {
}
}
private static void createFolder(IFolder folder) throws CoreException {
if (!folder.exists()) {
if (folder.getParent() instanceof IFolder) {
createFolder((IFolder) folder.getParent());
}
folder.create(true, true, null);
}
}
/**
* Try and find an experiment with the queried UUID in the experiment
* manager.
*
* @param expUUID
* queried {@link UUID}
* @return the experiment or null if none match.
*/
public static synchronized @Nullable TmfExperiment getExperimentByUUID(UUID expUUID) {
TmfExperiment experiment = EXPERIMENTS.get(expUUID);
if (experiment == null) {
experiment = createExperimentInstance(expUUID);
}
return experiment;
}
/**
* Get the list of trace UUIDs of an experiment from the experiment manager.
*
* @param expUUID
* queried {@link UUID}
* @return the list of trace UUIDs.
*/
public static List<UUID> getTraceUUIDs(UUID expUUID) {
return TRACE_UUIDS.getOrDefault(expUUID, Collections.emptyList());
}
/**
* Returns true if the given trace is in use by any experiment
*
* @param uuid
* the trace UUID
* @return true if the given trace is in use by any experiment
*/
public static boolean isTraceInUse(UUID uuid) {
synchronized (TRACE_UUIDS) {
return TRACE_UUIDS.values().stream().anyMatch(traceUUIDs -> traceUUIDs.contains(uuid));
}
}
/**
* Returns a {@link TraceAnnotationProvider} for a given experiment
*
* @param uuid
* the trace UUID
* @return {@link TraceAnnotationProvider}
*/
public static TraceAnnotationProvider getTraceAnnotationProvider(UUID uuid) {
return TRACE_ANNOTATION_PROVIDERS.get(uuid);
}
/**
* Dispose method to be only called at server shutdown. It disposes experiments, traces etc.
*/
public static void dispose() {
for (TmfExperiment experiment : EXPERIMENTS.values()) {
if (experiment != null) {
TmfSignalManager.dispatchSignal(new TmfTraceClosedSignal(experiment, experiment));
// Experiment dispose() will dispose its traces as well.
experiment.dispose();
}
}
EXPERIMENTS.clear();
TRACE_UUIDS.clear();
EXPERIMENT_RESOURCES.clear();
TRACE_ANNOTATION_PROVIDERS.clear();
}
}