99 lines
2.8 KiB
Java
99 lines
2.8 KiB
Java
package org.gcube.resourcemanagement.manager.webapp.context;
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import java.util.Objects;
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import java.util.UUID;
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import org.gcube.informationsystem.model.reference.entities.Context;
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import org.gcube.informationsystem.model.reference.entities.Resource;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
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import org.gcube.informationsystem.resourceregistry.client.ResourceRegistryClient;
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import org.gcube.informationsystem.resourceregistry.client.ResourceRegistryClientFactory;
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import org.gcube.informationsystem.resourceregistry.context.ResourceRegistryContextClient;
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import org.gcube.informationsystem.resourceregistry.context.ResourceRegistryContextClientFactory;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Queries submitted within the context resource.
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*
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* @author Manuele Simi (ISTI CNR)
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*
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*/
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final class Queries {
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private final ResourceRegistryContextClient cclient;
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private final ResourceRegistryClient rclient;
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protected static Logger logger = LoggerFactory.getLogger(Queries.class);
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protected Queries() {
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cclient = ResourceRegistryContextClientFactory.create();
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rclient = ResourceRegistryClientFactory.create();
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}
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/**
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* Makes the queries with the given client.
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*
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* @param cclient
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*/
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protected Queries(ResourceRegistryContextClient cclient, ResourceRegistryClient rclient) {
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this.cclient = cclient;
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this.rclient =rclient;
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}
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/**
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* Returns {@code true} if the provided context exists
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* otherwise returns {@code false}.
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*
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* @param context
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* @return {@code true} if the provided context exists
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* otherwise {@code false}
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* */
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protected boolean contextExists(UUID context) {
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try {
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Context results = this.cclient.read(context);
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return Objects.nonNull(results);
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} catch (ContextNotFoundException e) {
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logger.warn("Context not found: " + e.getMessage());
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return false;
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} catch (Exception e) {
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logger.warn("Failed to query the Resource Registry: " + e.getMessage());
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return false;
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}
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}
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/**
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* Fetches the resources context.
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*
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* @param context the resource context to fetch
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* @return
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*/
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protected Context fetchContext(UUID context) {
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try {
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return this.cclient.read(context);
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} catch (ResourceRegistryException e) {
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logger.warn("Failed to query the Resource Registry: " + e.getMessage());
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return null;
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}
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}
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/**
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* Detects if the context has no resources.
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*
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* @param context the context to check
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* @return true if the content is empty.
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*/
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protected boolean isContextEmpty(UUID context) {
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try {
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return this.rclient.getInstances(Resource.class, true).size() == 0;
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} catch (ResourceRegistryException e) {
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logger.warn("Failed to query the Resource Registry: " + e.getMessage());
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return false;
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}
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}
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}
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