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/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.rest.resources.streams.alerts;
import com.codahale.metrics.annotation.Timed;
import com.google.common.base.Strings;
import com.google.common.base.Throwables;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.ImmutableMap;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;
import org.apache.commons.mail.EmailException;
import org.apache.shiro.authz.annotation.RequiresAuthentication;
import org.graylog2.alarmcallbacks.AlarmCallbackConfiguration;
import org.graylog2.alarmcallbacks.AlarmCallbackConfigurationService;
import org.graylog2.alarmcallbacks.AlarmCallbackFactory;
import org.graylog2.alerts.AbstractAlertCondition;
import org.graylog2.alerts.Alert;
import org.graylog2.alerts.AlertService;
import org.graylog2.alerts.types.DummyAlertCondition;
import org.graylog2.audit.AuditEventTypes;
import org.graylog2.audit.jersey.AuditEvent;
import org.graylog2.audit.jersey.NoAuditEvent;
import org.graylog2.database.NotFoundException;
import org.graylog2.plugin.Tools;
import org.graylog2.plugin.alarms.AlertCondition;
import org.graylog2.plugin.alarms.callbacks.AlarmCallback;
import org.graylog2.plugin.alarms.callbacks.AlarmCallbackConfigurationException;
import org.graylog2.plugin.alarms.callbacks.AlarmCallbackException;
import org.graylog2.plugin.alarms.transports.TransportConfigurationException;
import org.graylog2.plugin.streams.Stream;
import org.graylog2.rest.models.streams.alerts.AlertListSummary;
import org.graylog2.rest.models.streams.alerts.AlertSummary;
import org.graylog2.shared.rest.resources.RestResource;
import org.graylog2.shared.security.RestPermissions;
import org.graylog2.streams.StreamService;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import javax.validation.constraints.Min;
import javax.ws.rs.BadRequestException;
import javax.ws.rs.DELETE;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.InternalServerErrorException;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkArgument;
@RequiresAuthentication
@Api(value = "Stream/Alerts", description = "Manage stream alerts for a given stream")
@Path("/streams/{streamId}/alerts")
public class StreamAlertResource extends RestResource {
private static final int REST_CHECK_CACHE_SECONDS = 30;
private static final Logger LOG = LoggerFactory.getLogger(StreamAlertResource.class);
private static final String CACHE_KEY_BASE = "alerts";
private static final Cache> CACHE = CacheBuilder.newBuilder()
.expireAfterWrite(REST_CHECK_CACHE_SECONDS, TimeUnit.SECONDS)
.build();
private final StreamService streamService;
private final AlertService alertService;
private final AlarmCallbackConfigurationService alarmCallbackConfigurationService;
private final AlarmCallbackFactory alarmCallbackFactory;
@Inject
public StreamAlertResource(StreamService streamService,
AlertService alertService,
AlarmCallbackConfigurationService alarmCallbackConfigurationService,
AlarmCallbackFactory alarmCallbackFactory) {
this.streamService = streamService;
this.alertService = alertService;
this.alarmCallbackConfigurationService = alarmCallbackConfigurationService;
this.alarmCallbackFactory = alarmCallbackFactory;
}
@GET
@Timed
@ApiOperation(value = "Get the most recent alarms of this stream.")
@Produces(MediaType.APPLICATION_JSON)
@ApiResponses(value = {
@ApiResponse(code = 404, message = "Stream not found."),
@ApiResponse(code = 400, message = "Invalid ObjectId.")
})
public AlertListSummary list(@ApiParam(name = "streamId", value = "The stream id this new alert condition belongs to.", required = true)
@PathParam("streamId") String streamId,
@ApiParam(name = "since", value = "Optional parameter to define a lower date boundary. (UNIX timestamp)")
@QueryParam("since") @DefaultValue("0") @Min(0) int sinceTs,
@ApiParam(name = "limit", value = "Maximum number of alerts to return.")
@QueryParam("limit") @DefaultValue("300") @Min(1) int limit) throws NotFoundException {
checkPermission(RestPermissions.STREAMS_READ, streamId);
final DateTime since = new DateTime(sinceTs * 1000L, DateTimeZone.UTC);
final Stream stream = streamService.load(streamId);
final List conditions = toSummaryList(alertService.loadRecentOfStream(stream.getId(), since, limit));
return AlertListSummary.create(alertService.totalCountForStream(streamId), conditions);
}
@GET
@Timed
@Path("paginated")
@ApiOperation(value = "Get the alarms of this stream, filtered by specifying limit and offset parameters.")
@Produces(MediaType.APPLICATION_JSON)
@ApiResponses(value = {
@ApiResponse(code = 404, message = "Stream not found."),
@ApiResponse(code = 400, message = "Invalid ObjectId.")
})
public AlertListSummary listPaginated(@ApiParam(name = "streamId", value = "The stream id this new alert condition belongs to.", required = true)
@PathParam("streamId") String streamId,
@ApiParam(name = "skip", value = "The number of elements to skip (offset).", required = true)
@QueryParam("skip") @DefaultValue("0") int skip,
@ApiParam(name = "limit", value = "The maximum number of elements to return.", required = true)
@QueryParam("limit") @DefaultValue("300") int limit) throws NotFoundException {
checkPermission(RestPermissions.STREAMS_READ, streamId);
final Stream stream = streamService.load(streamId);
final List conditions = toSummaryList(alertService.listForStreamId(stream.getId(), skip, limit));
return AlertListSummary.create(alertService.totalCountForStream(streamId), conditions);
}
@GET
@Timed
@Path("check")
@ApiOperation(value = "Check for triggered alert conditions of this streams. Results cached for " + REST_CHECK_CACHE_SECONDS + " seconds.")
@Produces(MediaType.APPLICATION_JSON)
@ApiResponses(value = {
@ApiResponse(code = 404, message = "Stream not found."),
@ApiResponse(code = 400, message = "Invalid ObjectId.")
})
public Map checkConditions(@ApiParam(name = "streamId", value = "The ID of the stream to check.", required = true)
@PathParam("streamId") String streamId) throws NotFoundException {
checkPermission(RestPermissions.STREAMS_READ, streamId);
final Stream stream = streamService.load(streamId);
final Map result;
try {
result = CACHE.get(CACHE_KEY_BASE + stream.getId(), () -> {
final List alertConditions = streamService.getAlertConditions(stream);
int triggered = 0;
final List