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/*-
* ========================LICENSE_START=================================
* ONAP : ccsdk oran
* ======================================================================
* Copyright (C) 2022 Nordix Foundation. All rights reserved.
* ======================================================================
* 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.
* ========================LICENSE_END===================================
*/
package org.onap.ccsdk.oran.a1policymanagementservice.datastore;
import java.net.URI;
import java.util.concurrent.CompletableFuture;
import org.onap.ccsdk.oran.a1policymanagementservice.configuration.ApplicationConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
import software.amazon.awssdk.core.BytesWrapper;
import software.amazon.awssdk.core.ResponseBytes;
import software.amazon.awssdk.core.async.AsyncRequestBody;
import software.amazon.awssdk.core.async.AsyncResponseTransformer;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.s3.S3AsyncClient;
import software.amazon.awssdk.services.s3.S3AsyncClientBuilder;
import software.amazon.awssdk.services.s3.model.CreateBucketRequest;
import software.amazon.awssdk.services.s3.model.CreateBucketResponse;
import software.amazon.awssdk.services.s3.model.DeleteBucketRequest;
import software.amazon.awssdk.services.s3.model.DeleteBucketResponse;
import software.amazon.awssdk.services.s3.model.DeleteObjectRequest;
import software.amazon.awssdk.services.s3.model.DeleteObjectResponse;
import software.amazon.awssdk.services.s3.model.GetObjectRequest;
import software.amazon.awssdk.services.s3.model.GetObjectResponse;
import software.amazon.awssdk.services.s3.model.ListObjectsRequest;
import software.amazon.awssdk.services.s3.model.ListObjectsResponse;
import software.amazon.awssdk.services.s3.model.PutObjectRequest;
import software.amazon.awssdk.services.s3.model.PutObjectResponse;
import software.amazon.awssdk.services.s3.model.S3Object;
class S3ObjectStore implements DataStore {
private static final Logger logger = LoggerFactory.getLogger(S3ObjectStore.class);
private final ApplicationConfig applicationConfig;
private static S3AsyncClient s3AsynchClient;
private final String location;
public S3ObjectStore(ApplicationConfig applicationConfig, String location) {
this.applicationConfig = applicationConfig;
this.location = location;
getS3AsynchClient(applicationConfig);
}
private static synchronized S3AsyncClient getS3AsynchClient(ApplicationConfig applicationConfig) {
if (applicationConfig.isS3Enabled() && s3AsynchClient == null) {
s3AsynchClient = getS3AsyncClientBuilder(applicationConfig).build();
}
return s3AsynchClient;
}
private static S3AsyncClientBuilder getS3AsyncClientBuilder(ApplicationConfig applicationConfig) {
URI uri = URI.create(applicationConfig.getS3EndpointOverride());
return S3AsyncClient.builder() //
.region(Region.US_EAST_1) //
.endpointOverride(uri) //
.credentialsProvider(StaticCredentialsProvider.create( //
AwsBasicCredentials.create(applicationConfig.getS3AccessKeyId(), //
applicationConfig.getS3SecretAccessKey())));
}
@Override
public Flux<String> listObjects(String prefix) {
return listObjectsInBucket(bucket(), location + "/" + prefix).map(S3Object::key) //
.map(this::externalName);
}
@Override
public Mono<Boolean> deleteObject(String name) {
DeleteObjectRequest request = DeleteObjectRequest.builder() //
.bucket(bucket()) //
.key(key(name)) //
.build();
CompletableFuture<DeleteObjectResponse> future = s3AsynchClient.deleteObject(request);
return Mono.fromFuture(future).map(resp -> true);
}
@Override
public Mono<byte[]> readObject(String name) {
return getDataFromS3Object(bucket(), name);
}
@Override
public Mono<byte[]> writeObject(String name, byte[] fileData) {
PutObjectRequest request = PutObjectRequest.builder() //
.bucket(bucket()) //
.key(key(name)) //
.build();
AsyncRequestBody body = AsyncRequestBody.fromBytes(fileData);
CompletableFuture<PutObjectResponse> future = s3AsynchClient.putObject(request, body);
return Mono.fromFuture(future) //
.map(putObjectResponse -> fileData) //
.doOnError(t -> logger.error("Failed to store object '{}' in S3 {}", key(name), t.getMessage()));
}
@Override
public Mono<String> createDataStore() {
return createS3Bucket(bucket());
}
private Mono<String> createS3Bucket(String s3Bucket) {
CreateBucketRequest request = CreateBucketRequest.builder() //
.bucket(s3Bucket) //
.build();
CompletableFuture<CreateBucketResponse> future = s3AsynchClient.createBucket(request);
return Mono.fromFuture(future) //
.map(f -> s3Bucket) //
.doOnError(t -> logger.debug("Could not create S3 bucket: {}", t.getMessage()))
.onErrorResume(t -> Mono.just(s3Bucket));
}
@Override
public Mono<String> deleteAllObjects() {
return listObjects("") //
.flatMap(this::deleteObject) //
.collectList() //
.map(resp -> "OK").onErrorResume(t -> Mono.just("NOK"));
}
public Mono<String> deleteBucket() {
DeleteBucketRequest request = DeleteBucketRequest.builder() //
.bucket(bucket()) //
.build();
CompletableFuture<DeleteBucketResponse> future = s3AsynchClient.deleteBucket(request);
return Mono.fromFuture(future) //
.doOnError(t -> logger.warn("Could not delete bucket: {}, reason: {}", bucket(), t.getMessage()))
.map(resp -> bucket()) //
.doOnNext(resp -> logger.debug("Deleted bucket: {}", bucket())).onErrorResume(t -> Mono.just("NOK"));
}
private String bucket() {
return applicationConfig.getS3Bucket();
}
private Flux<S3Object> listObjectsInBucket(String bucket, String prefix) {
return listObjectsRequest(bucket, prefix, null) //
.expand(response -> listObjectsRequest(bucket, prefix, response)) //
.map(ListObjectsResponse::contents) //
.doOnNext(f -> logger.debug("Found objects in {}: {}", bucket, f.size())) //
.doOnError(t -> logger.warn("Error fromlist objects: {}", t.getMessage())) //
.flatMap(Flux::fromIterable) //
.doOnNext(obj -> logger.debug("Found object: {}", obj.key()));
}
private Mono<ListObjectsResponse> listObjectsRequest(String bucket, String prefix,
ListObjectsResponse prevResponse) {
ListObjectsRequest.Builder builder = ListObjectsRequest.builder() //
.bucket(bucket) //
.maxKeys(1000) //
.prefix(prefix);
if (prevResponse != null) {
if (Boolean.TRUE.equals(prevResponse.isTruncated())) {
builder.marker(prevResponse.nextMarker());
} else {
return Mono.empty();
}
}
ListObjectsRequest listObjectsRequest = builder.build();
CompletableFuture<ListObjectsResponse> future = s3AsynchClient.listObjects(listObjectsRequest);
return Mono.fromFuture(future);
}
private Mono<byte[]> getDataFromS3Object(String bucket, String name) {
GetObjectRequest request = GetObjectRequest.builder() //
.bucket(bucket) //
.key(key(name)) //
.build();
CompletableFuture<ResponseBytes<GetObjectResponse>> future =
s3AsynchClient.getObject(request, AsyncResponseTransformer.toBytes());
return Mono.fromFuture(future) //
.map(BytesWrapper::asByteArray) //
.doOnError(t -> logger.error("Failed to get file from S3, key:{}, bucket: {}, {}", key(name), bucket,
t.getMessage())) //
.doOnEach(n -> logger.debug("Read file from S3: {} {}", bucket, key(name))) //
.onErrorResume(t -> Mono.empty());
}
private String key(String name) {
return location + "/" + name;
}
private String externalName(String internalName) {
return internalName.substring(key("").length());
}
}
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