RestCatAction.java example

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 * the Apache License, Version 2.0 (the "License"); you may
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
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package org.elasticsearch.rest.action.cat;

import org.elasticsearch.client.Client;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.*;

import java.util.Set;

import static org.elasticsearch.rest.RestRequest.Method.GET;

public class RestCatAction extends BaseRestHandler {

    private static final String CAT = "=^.^=";
    private static final String CAT_NL = CAT + "\n";
    private final String HELP;

    @Inject
    public RestCatAction(Settings settings, RestController controller, Set<AbstractCatAction> catActions, Client client) {
        super(settings, controller, client);
        controller.registerHandler(GET, "/_cat", this);
        StringBuilder sb = new StringBuilder();
        sb.append(CAT_NL);
        for (AbstractCatAction catAction : catActions) {
            catAction.documentation(sb);
        }
        HELP = sb.toString();
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
        channel.sendResponse(new BytesRestResponse(RestStatus.OK, HELP));
    }
}