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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.so.sdcsimulator.providers;
import static org.onap.so.sdcsimulator.utils.Constants.CATALOG_URL;
import static org.onap.so.sdcsimulator.utils.Constants.DOT_CSAR;
import static org.onap.so.sdcsimulator.utils.Constants.MAIN_RESOURCE_FOLDER;
import static org.onap.so.sdcsimulator.utils.Constants.WILD_CARD_REGEX;
import static org.springframework.core.io.support.ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import org.onap.so.sdcsimulator.models.ResourceArtifact;
import org.onap.so.sdcsimulator.utils.Constants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.stereotype.Service;
import org.springframework.util.StreamUtils;
/**
* @author Eoin Hanan (eoin.hanan@est.tech)
*/
@Service
public class ResourceProviderImpl implements ResourceProvider {
private static final Logger LOGGER = LoggerFactory.getLogger(ResourceProvider.class);
private final String resourceLocation;
private final ResourcePatternResolver resourcePatternResolver;
@Autowired
public ResourceProviderImpl(@Value("${sdc.resource.location:/app/csars/}") final String resourceLocation,
final ResourcePatternResolver resourcePatternResolver) {
this.resourceLocation = resourceLocation;
this.resourcePatternResolver = resourcePatternResolver;
}
@Override
public Optional<byte[]> getResource(final String csarId) {
try {
final Optional<InputStream> optionalInputStream = getInputStream(csarId);
if (optionalInputStream.isPresent()) {
return Optional.of(StreamUtils.copyToByteArray(optionalInputStream.get()));
}
} catch (final IOException ioException) {
LOGGER.warn("Unable to create file stream ...", ioException);
}
return Optional.empty();
}
@Override
public Set<ResourceArtifact> getResource() {
final Set<ResourceArtifact> result = new HashSet<>();
final Path dir = Paths.get(resourceLocation);
if (Files.exists(dir)) {
try (final DirectoryStream<Path> stream = Files.newDirectoryStream(dir, WILD_CARD_REGEX + DOT_CSAR)) {
for (final Path entry : stream) {
final String filename = getFilenameWithoutExtension(entry);
final ResourceArtifact artifact = getResourceArtifact(filename);
result.add(artifact);
LOGGER.info("Found resource on file system: {}", artifact);
}
} catch (final IOException ioException) {
LOGGER.error("Unable to find resources on filesystem", ioException);
}
}
try {
final String csarFileLocationPattern =
CLASSPATH_ALL_URL_PREFIX + MAIN_RESOURCE_FOLDER + WILD_CARD_REGEX + DOT_CSAR;
final Resource[] resources = resourcePatternResolver.getResources(csarFileLocationPattern);
if (resources != null) {
for (final Resource resource : resources) {
final ResourceArtifact artifact =
getResourceArtifact(getFilenameWithoutExtension(resource.getFilename()));
result.add(artifact);
LOGGER.info("Found resource in classpath: {}", artifact);
}
}
} catch (final IOException ioException) {
LOGGER.error("Unable to find resources in classpath", ioException);
}
return result;
}
private ResourceArtifact getResourceArtifact(final String filename) {
return new ResourceArtifact().uuid(filename).invariantUuid(filename).name(filename).version("1.0")
.toscaModelUrl(CATALOG_URL + "/resources/" + filename + "/toscaModel").category("Generic")
.subCategory("Network Service").resourceType("VF").lifecycleState("CERTIFIED")
.lastUpdaterUserId("SDC_SIMULATOR");
}
private String getFilenameWithoutExtension(final String filename) {
return filename.substring(0, filename.lastIndexOf('.'));
}
private String getFilenameWithoutExtension(final Path file) {
return getFilenameWithoutExtension(file.getFileName().toString());
}
private Optional<InputStream> getInputStream(final String csarId) throws IOException {
final Path filePath = Paths.get(resourceLocation, csarId + DOT_CSAR);
if (Files.exists(filePath)) {
LOGGER.info("Found resource in on file system using path: {}", filePath);
return Optional.of(Files.newInputStream(filePath));
}
LOGGER.warn("Couldn't find file on file system '{}', will search it in classpath", filePath);
final String path = MAIN_RESOURCE_FOLDER + csarId + DOT_CSAR;
ClassPathResource classPathResource = getClassPathResource(path);
if (classPathResource.exists()) {
LOGGER.info("Found resource in classpath using path: {}", path);
return Optional.of(classPathResource.getInputStream());
}
LOGGER.warn("Couldn't find file on file system '{}', will return default csar", filePath);
classPathResource = getClassPathResource(getDefaultCsarPath());
if (classPathResource.exists()) {
LOGGER.info("Found default csar in classpath");
return Optional.of(classPathResource.getInputStream());
}
LOGGER.error("Couldn't find default csar in classpath ....");
return Optional.empty();
}
private ClassPathResource getClassPathResource(final String path) {
return new ClassPathResource(path, this.getClass());
}
/*
* Used in test
*/
String getDefaultCsarPath() {
return Constants.DEFAULT_CSAR_PATH;
}
}
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