/*
* Copyright (c) 2014.
*
* BaasBox - info@baasbox.com
*
* 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.
*/
package com.baasbox.commands;
import com.baasbox.commands.exceptions.CommandException;
import com.baasbox.commands.exceptions.CommandExecutionException;
import com.baasbox.commands.exceptions.CommandParsingException;
import com.baasbox.dao.exception.CollectionAlreadyExistsException;
import com.baasbox.dao.exception.InvalidCollectionException;
import com.baasbox.dao.exception.SqlInjectionException;
import com.baasbox.db.DbHelper;
import com.baasbox.service.scripting.base.JsonCallback;
import com.baasbox.service.storage.CollectionService;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.BooleanNode;
import com.google.common.collect.ImmutableMap;
import java.util.Map;
/**
* Created by Andrea Tortorella on 04/07/14.
*/
class CollectionsResource extends Resource {
public static final Resource INSTANCE = new CollectionsResource();
@Override
public String name() {
return "collections";
}
@Override
public Map<String, ScriptCommand> commands() {
return COMMANDS;
}
private static Map<String,ScriptCommand> COMMANDS =
ImmutableMap.<String,ScriptCommand>builder()
.put("post", new ScriptCommand() {
@Override
public JsonNode execute(JsonNode command, JsonCallback callback) throws CommandException {
return createCollection(command);
}
})
.put("exists", new ScriptCommand() {
@Override
public JsonNode execute(JsonNode command, JsonCallback callback) throws CommandException {
return existsCollection(command);
}
})
.put("drop", new ScriptCommand() {
@Override
public JsonNode execute(JsonNode command, JsonCallback callback) throws CommandException {
return dropCollection(command);
}
})
.build();
private static JsonNode dropCollection(JsonNode command) throws CommandException {
checkPreconditions(command,true);
String coll = extractCollectionName(command);
try {
CollectionService.drop(coll);
return BooleanNode.getTrue();
} catch (InvalidCollectionException e) {
return BooleanNode.getFalse();
} catch (Exception e){
throw new CommandExecutionException(command,"Error dropping collection: "+e.getMessage());
}
}
private static void checkPreconditions(JsonNode command,boolean nonTransactional) throws CommandExecutionException {
if (!DbHelper.isConnectedAsAdmin(false)){
throw new CommandExecutionException(command,"non authorized");
}
if (nonTransactional && DbHelper.isInTransaction()){
throw new CommandExecutionException(command,"cannot alter collections during transaction");
}
}
private static JsonNode existsCollection(JsonNode command) throws CommandException {
// checkPreconditions(command,false);
String coll = extractCollectionName(command);
try {
boolean res =CollectionService.exists(coll);
return res? BooleanNode.getTrue():BooleanNode.getFalse();
} catch (SqlInjectionException e) {
throw new CommandExecutionException(command,e.getMessage());
} catch (InvalidCollectionException e) {
throw new CommandExecutionException(command,"Invalid collection '"+coll+"':"+e.getMessage());
}
}
private static JsonNode createCollection(JsonNode command) throws CommandException{
checkPreconditions(command,true);
String coll = extractCollectionName(command);
try {
CollectionService.create(coll);
return BooleanNode.getTrue();
} catch (CollectionAlreadyExistsException e) {
return BooleanNode.getFalse();
} catch (InvalidCollectionException e){
throw new CommandExecutionException(command,"Invalid collection name: "+e.getMessage());
} catch (Throwable e) {
throw new CommandExecutionException(command,"Error creating collection: "+e.getMessage());
}
}
private static String extractCollectionName(JsonNode command) throws CommandParsingException {
JsonNode node = command.get(ScriptCommand.PARAMS);
if (!node.isTextual()){
throw new CommandParsingException(command,"expeceted params to be the name of a collection");
}
return node.asText();
}
}