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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.contentpacks.facades;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.annotations.VisibleForTesting;
import org.graylog.plugins.pipelineprocessor.db.RuleDao;
import org.graylog.plugins.pipelineprocessor.db.RuleService;
import org.graylog2.contentpacks.EntityDescriptorIds;
import org.graylog2.contentpacks.exceptions.DivergingEntityConfigurationException;
import org.graylog2.contentpacks.model.ModelId;
import org.graylog2.contentpacks.model.ModelType;
import org.graylog2.contentpacks.model.ModelTypes;
import org.graylog2.contentpacks.model.entities.Entity;
import org.graylog2.contentpacks.model.entities.EntityDescriptor;
import org.graylog2.contentpacks.model.entities.EntityExcerpt;
import org.graylog2.contentpacks.model.entities.EntityV1;
import org.graylog2.contentpacks.model.entities.NativeEntity;
import org.graylog2.contentpacks.model.entities.NativeEntityDescriptor;
import org.graylog2.contentpacks.model.entities.PipelineRuleEntity;
import org.graylog2.contentpacks.model.entities.references.ValueReference;
import org.graylog2.database.NotFoundException;
import org.graylog2.plugin.Tools;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
public class PipelineRuleFacade implements EntityFacade {
private static final Logger LOG = LoggerFactory.getLogger(PipelineRuleFacade.class);
public static final ModelType TYPE_V1 = ModelTypes.PIPELINE_RULE_V1;
private final ObjectMapper objectMapper;
private final RuleService ruleService;
@Inject
public PipelineRuleFacade(ObjectMapper objectMapper, RuleService ruleService) {
this.objectMapper = objectMapper;
this.ruleService = ruleService;
}
@VisibleForTesting
Entity exportNativeEntity(RuleDao ruleDao, EntityDescriptorIds entityDescriptorIds) {
final PipelineRuleEntity ruleEntity = PipelineRuleEntity.create(
ValueReference.of(ruleDao.title()),
ValueReference.of(ruleDao.description()),
ValueReference.of(ruleDao.source()));
final JsonNode data = objectMapper.convertValue(ruleEntity, JsonNode.class);
return EntityV1.builder()
.id(ModelId.of(entityDescriptorIds.getOrThrow(ruleDao.id(), ModelTypes.PIPELINE_RULE_V1)))
.type(ModelTypes.PIPELINE_RULE_V1)
.data(data)
.build();
}
@Override
public NativeEntity createNativeEntity(Entity entity,
Map parameters,
Map nativeEntities,
String username) {
if (entity instanceof EntityV1) {
return decode((EntityV1) entity, parameters);
} else {
throw new IllegalArgumentException("Unsupported entity version: " + entity.getClass());
}
}
private NativeEntity decode(EntityV1 entity, Map parameters) {
final PipelineRuleEntity ruleEntity = objectMapper.convertValue(entity.data(), PipelineRuleEntity.class);
final String title = ruleEntity.title().asString(parameters);
final String source = ruleEntity.source().asString(parameters);
final DateTime now = Tools.nowUTC();
final ValueReference description = ruleEntity.description();
final RuleDao ruleDao = RuleDao.builder()
.title(title)
.description(description == null ? null : description.asString(parameters))
.source(source)
.createdAt(now)
.modifiedAt(now)
.build();
final RuleDao savedRuleDao = ruleService.save(ruleDao);
return NativeEntity.create(entity.id(), savedRuleDao.id(), TYPE_V1, savedRuleDao.title(), savedRuleDao);
}
@Override
public Optional> loadNativeEntity(NativeEntityDescriptor nativeEntityDescriptor) {
try {
final RuleDao ruleDao = ruleService.load(nativeEntityDescriptor.id().id());
return Optional.of(NativeEntity.create(nativeEntityDescriptor, ruleDao));
} catch (NotFoundException e) {
return Optional.empty();
}
}
@Override
public void delete(RuleDao nativeEntity) {
ruleService.delete(nativeEntity.id());
}
@Override
public Optional> findExisting(Entity entity, Map parameters) {
if (entity instanceof EntityV1) {
return findExisting((EntityV1) entity, parameters);
} else {
throw new IllegalArgumentException("Unsupported entity version: " + entity.getClass());
}
}
private Optional> findExisting(EntityV1 entity, Map parameters) {
final PipelineRuleEntity ruleEntity = objectMapper.convertValue(entity.data(), PipelineRuleEntity.class);
final String title = ruleEntity.title().asString(parameters);
final String source = ruleEntity.source().asString(parameters);
try {
final RuleDao ruleDao = ruleService.loadByName(title);
compareRuleSources(title, source, ruleDao.source());
return Optional.of(NativeEntity.create(entity.id(), ruleDao.id(), TYPE_V1, ruleDao.title(), ruleDao));
} catch (NotFoundException e) {
return Optional.empty();
}
}
private void compareRuleSources(String name, String expectedRuleSource, String actualRuleSource) {
if (!actualRuleSource.equals(expectedRuleSource)) {
LOG.debug("Expected source for rule \"{}\":\n{}\n\nActual source:\n{}", name, expectedRuleSource, actualRuleSource);
throw new DivergingEntityConfigurationException("Different pipeline rule sources for pipeline rule with name \"" + name + "\"");
}
}
@Override
public EntityExcerpt createExcerpt(RuleDao ruleDao) {
return EntityExcerpt.builder()
.id(ModelId.of(ruleDao.id()))
.type(ModelTypes.PIPELINE_RULE_V1)
.title(ruleDao.title())
.build();
}
@Override
public Set listEntityExcerpts() {
return ruleService.loadAll().stream()
.map(this::createExcerpt)
.collect(Collectors.toSet());
}
@Override
public Optional exportEntity(EntityDescriptor entityDescriptor, EntityDescriptorIds entityDescriptorIds) {
final ModelId modelId = entityDescriptor.id();
try {
final RuleDao ruleDao = ruleService.load(modelId.id());
return Optional.of(exportNativeEntity(ruleDao, entityDescriptorIds));
} catch (NotFoundException e) {
LOG.debug("Couldn't find pipeline rule {}", entityDescriptor, e);
return Optional.empty();
}
}
}
