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Java-based middleware for in-memory processing of big data in a distributed environment.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.ignite.internal.processors.rest.handlers;
import org.apache.ignite.IgniteLogger;
import org.apache.ignite.internal.GridKernalContext;
import org.apache.ignite.internal.util.typedef.X;
import org.apache.ignite.internal.util.typedef.internal.SB;
/**
* Abstract command handler.
*/
public abstract class GridRestCommandHandlerAdapter implements GridRestCommandHandler {
/** Used cache name in case the name was not defined in a request. */
protected static final String DFLT_CACHE_NAME = "default";
/** Kernal context. */
protected final GridKernalContext ctx;
/** Log. */
protected final IgniteLogger log;
/**
* @param ctx Context.
*/
protected GridRestCommandHandlerAdapter(GridKernalContext ctx) {
this.ctx = ctx;
log = ctx.log(getClass());
}
/**
* Return missing parameter error message.
*
* @param param Parameter name.
* @return Missing parameter error message.
*/
protected static String missingParameter(String param) {
return "Failed to find mandatory parameter in request: " + param;
}
/**
* Converts exception to string representation for error in response.
*
* @param e Exception.
* @return String representation of exception for error in response.
*/
protected static String errorMessage(Exception e) {
SB sb = new SB();
sb.a(e.getMessage()).a("\n").a("suppressed: \n");
for (Throwable t : X.getSuppressedList(e))
sb.a(t.getMessage()).a("\n");
return sb.toString();
}
}