package com.thinkbiganalytics.nifi.v1.rest.client;
/*-
* #%L
* thinkbig-nifi-rest-client-v1
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import com.google.common.collect.ImmutableMap;
import com.thinkbiganalytics.nifi.rest.client.AbstractNiFiControllerServicesRestClient;
import com.thinkbiganalytics.nifi.rest.client.NiFiControllerServicesRestClient;
import com.thinkbiganalytics.nifi.rest.client.NiFiRestClient;
import com.thinkbiganalytics.nifi.rest.client.NifiClientRuntimeException;
import com.thinkbiganalytics.nifi.rest.client.NifiComponentNotFoundException;
import com.thinkbiganalytics.nifi.rest.support.NifiConstants;
import org.apache.nifi.web.api.dto.ControllerServiceDTO;
import org.apache.nifi.web.api.dto.DocumentedTypeDTO;
import org.apache.nifi.web.api.dto.RevisionDTO;
import org.apache.nifi.web.api.entity.ControllerServiceEntity;
import org.apache.nifi.web.api.entity.ControllerServiceTypesEntity;
import org.apache.nifi.web.api.entity.ControllerServicesEntity;
import java.util.Collections;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.Nonnull;
import javax.ws.rs.ClientErrorException;
import javax.ws.rs.NotFoundException;
/**
* Implements a {@link NiFiControllerServicesRestClient} for communicating with NiFi v1.0.
*/
public class NiFiControllerServicesRestClientV1 extends AbstractNiFiControllerServicesRestClient {
/**
* Base path for controller service requests
*/
private static final String BASE_PATH = "/controller-services/";
/**
* REST client for communicating with NiFi
*/
private final NiFiRestClientV1 client;
/**
* Constructs a {@code NiFiControllerServicesRestClientV1} with the specified NiFi REST client.
*
* @param client the REST client
*/
public NiFiControllerServicesRestClientV1(@Nonnull final NiFiRestClientV1 client) {
this.client = client;
}
@Nonnull
@Override
public Optional<ControllerServiceDTO> delete(@Nonnull final String id) {
Optional<ControllerServiceEntity> controllerServiceEntity = null;
try {
controllerServiceEntity = findEntityById(id);
}catch (Exception e){
return Optional.empty();
}
if(controllerServiceEntity.isPresent()) {
return controllerServiceEntity
.flatMap(controllerService -> {
final Long version = controllerService.getRevision().getVersion();
try {
return Optional.of(client.delete(BASE_PATH + id, ImmutableMap.of("version", version), ControllerServiceEntity.class).getComponent());
} catch (final NotFoundException e) {
return Optional.empty();
}
});
}
else {
return Optional.empty();
}
}
@Nonnull
@Override
public ControllerServiceDTO create(@Nonnull ControllerServiceDTO controllerService) {
final ControllerServiceEntity entity = new ControllerServiceEntity();
entity.setComponent(controllerService);
final RevisionDTO revision = new RevisionDTO();
revision.setVersion(0L);
entity.setRevision(revision);
return client.post("/process-groups/root/controller-services", entity, ControllerServiceEntity.class).getComponent();
}
@Nonnull
@Override
public Set<ControllerServiceDTO> findAll() {
return client.get("/flow/process-groups/root/controller-services", null, ControllerServicesEntity.class)
.getControllerServices().stream()
.map(ControllerServiceEntity::getComponent)
.collect(Collectors.toSet());
}
@Nonnull
@Override
public Optional<ControllerServiceDTO> findById(@Nonnull final String id) {
return findEntityById(id).map(ControllerServiceEntity::getComponent);
}
@Override
public NiFiRestClient getClient() {
return client;
}
@Nonnull
@Override
public Set<DocumentedTypeDTO> getTypes() {
return client.get("/flow/controller-service-types", null, ControllerServiceTypesEntity.class).getControllerServiceTypes();
}
@Nonnull
@Override
public Set<DocumentedTypeDTO> getTypes(@Nonnull final String serviceType) {
return client.get("/flow/controller-service-types", Collections.singletonMap("serviceType", serviceType), ControllerServiceTypesEntity.class).getControllerServiceTypes();
}
@Nonnull
@Override
public ControllerServiceDTO update(@Nonnull final ControllerServiceDTO controllerService) {
return findEntityById(controllerService.getId())
.flatMap(current -> {
final ControllerServiceEntity entity = new ControllerServiceEntity();
entity.setComponent(controllerService);
final RevisionDTO revision = new RevisionDTO();
revision.setVersion(current.getRevision().getVersion());
entity.setRevision(revision);
try {
return Optional.of(client.put(BASE_PATH + controllerService.getId(), entity, ControllerServiceEntity.class).getComponent());
} catch (final NotFoundException e) {
return Optional.empty();
} catch (final ClientErrorException e) {
throw new NifiClientRuntimeException("Error updating controller service: " + e.getResponse().readEntity(String.class), e);
}
})
.orElseThrow(() -> new NifiComponentNotFoundException(controllerService.getId(), NifiConstants.NIFI_COMPONENT_TYPE.CONTROLLER_SERVICE, null));
}
/**
* Gets a controller service entity.
*
* @param id the controller service id
* @return the controller service entity, if found
*/
@Nonnull
private Optional<ControllerServiceEntity> findEntityById(@Nonnull final String id) {
try {
return Optional.ofNullable(client.getWithoutErrorLogging(BASE_PATH + id, null, ControllerServiceEntity.class));
} catch (final NotFoundException e) {
return Optional.empty();
}
}
}