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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.rest.action.cat;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.io.UTF8StreamWriter;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestStatus;
import static org.elasticsearch.rest.action.support.RestTable.buildHelpWidths;
import static org.elasticsearch.rest.action.support.RestTable.pad;
/**
*
*/
public abstract class AbstractCatAction extends BaseRestHandler {
public AbstractCatAction(Settings settings, RestController controller, Client client) {
super(settings, client);
}
protected abstract void doRequest(final RestRequest request, final RestChannel channel, final Client client);
protected abstract void documentation(StringBuilder sb);
protected abstract Table getTableWithHeader(final RestRequest request);
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) throws Exception {
boolean helpWanted = request.paramAsBoolean("help", false);
if (helpWanted) {
Table table = getTableWithHeader(request);
int[] width = buildHelpWidths(table, request);
BytesStreamOutput bytesOutput = channel.bytesOutput();
UTF8StreamWriter out = new UTF8StreamWriter().setOutput(bytesOutput);
for (Table.Cell cell : table.getHeaders()) {
// need to do left-align always, so create new cells
pad(new Table.Cell(cell.value), width[0], request, out);
out.append(" | ");
pad(new Table.Cell(cell.attr.containsKey("alias") ? cell.attr.get("alias") : ""), width[1], request, out);
out.append(" | ");
pad(new Table.Cell(cell.attr.containsKey("desc") ? cell.attr.get("desc") : "not available"), width[2], request, out);
out.append("\n");
}
out.close();
channel.sendResponse(new BytesRestResponse(RestStatus.OK, BytesRestResponse.TEXT_CONTENT_TYPE, bytesOutput.bytes()));
} else {
doRequest(request, channel, client);
}
}
}
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