org.springframework.cloud.dataflow.server.service.impl.validation.DefaultValidationService.java Source code

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/*
 * Copyright 2018 the original author or authors.
 *
 * 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
 *
 *      https://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.
 */
package org.springframework.cloud.dataflow.server.service.impl.validation;

import java.io.File;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.boot.loader.archive.Archive;
import org.springframework.boot.loader.archive.ExplodedArchive;
import org.springframework.boot.loader.archive.JarFileArchive;
import org.springframework.cloud.dataflow.configuration.metadata.BootClassLoaderFactory;
import org.springframework.cloud.dataflow.core.AppRegistration;
import org.springframework.cloud.dataflow.core.ApplicationType;
import org.springframework.cloud.dataflow.registry.service.AppRegistryService;
import org.springframework.cloud.dataflow.server.DockerValidatorProperties;
import org.springframework.cloud.dataflow.server.service.ValidationService;
import org.springframework.cloud.deployer.resource.docker.DockerResource;
import org.springframework.core.io.Resource;
import org.springframework.util.Assert;

/**
 * Implementation of Validation Service that delegates to the application registry.
 *
 * @author Glenn Renfo
 * @author Mark Pollack
 */
public class DefaultValidationService implements ValidationService {

    private static Log logger = LogFactory.getLog(DefaultValidationService.class);

    /**
     * The urls and credentials to required to validate access docker resources.
     */
    private final DockerValidatorProperties dockerValidatorProperties;

    private final AppRegistryService appRegistry;

    public DefaultValidationService(AppRegistryService appRegistry,
            DockerValidatorProperties dockerValidatorProperties) {
        Assert.notNull(dockerValidatorProperties, "DockerValidatorProperties must not be null");
        Assert.notNull(appRegistry, "AppRegistryService must not be null");
        this.dockerValidatorProperties = dockerValidatorProperties;
        this.appRegistry = appRegistry;
    }

    @Override
    public boolean isRegistered(String name, ApplicationType applicationType) {
        return appRegistry.appExist(name, applicationType);
    }

    @Override
    public boolean validate(String name, ApplicationType appType) {
        Assert.hasText(name, "name must not be null or empty");
        Assert.notNull(appType, "ApplicationType must not be null");
        boolean result = false;
        AppRegistration registration = appRegistry.find(name, appType);

        if (registration != null) {
            Resource resource = appRegistry.getAppResource(registration);
            try {
                if ((resource instanceof DockerResource)) {
                    result = validateDockerResource(dockerValidatorProperties, (DockerResource) resource);
                } else {
                    new BootClassLoaderFactory(resolveAsArchive(resource), null).createClassLoader();
                    result = true;
                }
            } catch (Exception ex) {
                logger.info(String.format("The app %s was marked invalid because: ", name), ex);
            }
        }
        return result;
    }

    private static boolean validateDockerResource(DockerValidatorProperties dockerValidatorProperties,
            DockerResource resource) throws Exception {
        DockerRegistryValidator info = new DockerRegistryValidator(dockerValidatorProperties, resource);
        return info.isImagePresent();
    }

    private static Archive resolveAsArchive(Resource app) throws IOException {
        Assert.notNull(app, "The resource specified for the app must not be null");
        File moduleFile = app.getFile();
        return moduleFile.isDirectory() ? new ExplodedArchive(moduleFile) : new JarFileArchive(moduleFile);
    }

}