org.elasticsearch.client.sniff.SnifferBuilder Maven / Gradle / Ivy
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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.client.sniff;
import org.elasticsearch.client.RestClient;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
/**
* Sniffer builder. Helps creating a new {@link Sniffer}.
*/
public final class SnifferBuilder {
public static final long DEFAULT_SNIFF_INTERVAL = TimeUnit.MINUTES.toMillis(5);
public static final long DEFAULT_SNIFF_AFTER_FAILURE_DELAY = TimeUnit.MINUTES.toMillis(1);
private final RestClient restClient;
private long sniffIntervalMillis = DEFAULT_SNIFF_INTERVAL;
private long sniffAfterFailureDelayMillis = DEFAULT_SNIFF_AFTER_FAILURE_DELAY;
private HostsSniffer hostsSniffer;
/**
* Creates a new builder instance by providing the {@link RestClient} that will be used to communicate with elasticsearch
*/
SnifferBuilder(RestClient restClient) {
Objects.requireNonNull(restClient, "restClient cannot be null");
this.restClient = restClient;
}
/**
* Sets the interval between consecutive ordinary sniff executions in milliseconds. Will be honoured when
* sniffOnFailure is disabled or when there are no failures between consecutive sniff executions.
* @throws IllegalArgumentException if sniffIntervalMillis is not greater than 0
*/
public SnifferBuilder setSniffIntervalMillis(int sniffIntervalMillis) {
if (sniffIntervalMillis <= 0) {
throw new IllegalArgumentException("sniffIntervalMillis must be greater than 0");
}
this.sniffIntervalMillis = sniffIntervalMillis;
return this;
}
/**
* Sets the delay of a sniff execution scheduled after a failure (in milliseconds)
*/
public SnifferBuilder setSniffAfterFailureDelayMillis(int sniffAfterFailureDelayMillis) {
if (sniffAfterFailureDelayMillis <= 0) {
throw new IllegalArgumentException("sniffAfterFailureDelayMillis must be greater than 0");
}
this.sniffAfterFailureDelayMillis = sniffAfterFailureDelayMillis;
return this;
}
/**
* Sets the {@link HostsSniffer} to be used to read hosts. A default instance of {@link ElasticsearchHostsSniffer}
* is created when not provided. This method can be used to change the configuration of the {@link ElasticsearchHostsSniffer},
* or to provide a different implementation (e.g. in case hosts need to taken from a different source).
*/
public SnifferBuilder setHostsSniffer(HostsSniffer hostsSniffer) {
Objects.requireNonNull(hostsSniffer, "hostsSniffer cannot be null");
this.hostsSniffer = hostsSniffer;
return this;
}
/**
* Creates the {@link Sniffer} based on the provided configuration.
*/
public Sniffer build() {
if (hostsSniffer == null) {
this.hostsSniffer = new ElasticsearchHostsSniffer(restClient);
}
return new Sniffer(restClient, hostsSniffer, sniffIntervalMillis, sniffAfterFailureDelayMillis);
}
}