context-manager/src/main/java/org/gcube/vremanagement/contextmanager/handlers/ContextHandler.java

package org.gcube.vremanagement.contextmanager.handlers;

import java.util.List;

import javax.enterprise.inject.Any;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;
import javax.inject.Singleton;

import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.vremanagement.contextmanager.ContextAppManager;
import org.gcube.vremanagement.contextmanager.exceptions.ContextAlreadyExistsException;
import org.gcube.vremanagement.contextmanager.model.exceptions.InvalidContextException;
import org.gcube.vremanagement.contextmanager.model.operators.context.CustomContextOperator;
import org.gcube.vremanagement.contextmanager.model.operators.context.MandatoryContextOperator;
import org.gcube.vremanagement.contextmanager.model.types.Context;
import org.gcube.vremanagement.contextmanager.model.types.Context.Type;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


@Singleton
public class ContextHandler {
	
	private static Logger log = LoggerFactory.getLogger(ContextHandler.class);
	
	@Inject
	@Any
	Instance<MandatoryContextOperator> mandatoryContextOperators;
	
	@Inject
	@Any
	Instance<CustomContextOperator> customContextOperators;
	
	@Inject
	ContextContainer contextContainer;
	
	public void createContext(String parentContextId, String vreName, List<String> resourcesIds, ContextAppManager appContext) throws InvalidContextException {
		Context parentContext = contextContainer.getContextById(parentContextId);
		
		Context newContext = new Context(parentContext, vreName, vreName, Type.VRE);
		try {
			contextContainer.addContext(newContext );
		} catch (ContextAlreadyExistsException e) {
			throw new InvalidContextException("the context with id "+vreName+" already exists");
		}
		for (String resourceId: resourcesIds) {
			contextContainer.addResource(newContext.getId(), resourceId);
			log.debug("resource {} added", resourceId);
		}
		
		mandatoryContextOperators.forEach(co -> co.onCreateContext(SecurityTokenProvider.instance.get(), newContext.getId(), null));
	}
	
	public void disposeContext(String contextId, ContextAppManager appContext) throws InvalidContextException {
		contextContainer.removeContext(contextId);
		mandatoryContextOperators.forEach(co -> co.onDisposeContext(SecurityTokenProvider.instance.get(), contextId, null));
	}
	
	public List<String> getAvailableContexts(){
		return contextContainer.getAvailableContexts();
	}
	
	public List<String> getAssociatedResources(String contextId)  throws InvalidContextException{
		return contextContainer.getResources(contextId);
	}
}