org.elasticsearch.rest.action.admin.indices.alias.head.RestAliasesExistAction Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.rest.action.admin.indices.alias.head;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.alias.exists.AliasesExistResponse;
import org.elasticsearch.action.admin.indices.alias.get.GetAliasesRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.*;
import static org.elasticsearch.rest.RestRequest.Method.HEAD;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
/**
*/
public class RestAliasesExistAction extends BaseRestHandler {
@Inject
public RestAliasesExistAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(HEAD, "/_alias/{name}", this);
controller.registerHandler(HEAD, "/{index}/_alias/{name}", this);
controller.registerHandler(HEAD, "/{index}/_alias", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel) {
String[] aliases = request.paramAsStringArray("name", Strings.EMPTY_ARRAY);
final String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
GetAliasesRequest getAliasesRequest = new GetAliasesRequest(aliases);
getAliasesRequest.indices(indices);
getAliasesRequest.indicesOptions(IndicesOptions.fromRequest(request, getAliasesRequest.indicesOptions()));
client.admin().indices().aliasesExist(getAliasesRequest, new ActionListener() {
@Override
public void onResponse(AliasesExistResponse response) {
try {
if (response.isExists()) {
channel.sendResponse(new StringRestResponse(OK));
} else {
channel.sendResponse(new StringRestResponse(NOT_FOUND));
}
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(new StringRestResponse(ExceptionsHelper.status(e)));
} catch (Exception e1) {
logger.error("Failed to send failure response", e1);
}
}
});
}
}