com.elastisys.scale.cloudpool.commons.basepool.config.PoolUpdateConfig Maven / Gradle / Ivy

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package com.elastisys.scale.cloudpool.commons.basepool.config;

import static com.google.common.base.Preconditions.checkArgument;

import com.elastisys.scale.cloudpool.api.CloudPool;
import com.elastisys.scale.cloudpool.api.types.MachinePool;
import com.elastisys.scale.commons.json.JsonUtils;
import com.elastisys.scale.commons.json.types.TimeInterval;
import com.google.common.base.Objects;

/**
 * Controls the {@link CloudPool}'s behavior with respect to how often to
 * attempt to update the size of the {@link MachinePool} to match the desired
 * size.
 */
public class PoolUpdateConfig {

	/**
	 * The time interval between periodical pool size updates.
	 */
	private final TimeInterval updateInterval;

	/**
	 * Constructs a new {@link PoolUpdateConfig}.
	 *
	 * @param updateInterval
	 *            The time interval between periodical pool size updates. May be
	 *            null. Default: 60 seconds.
	 */
	public PoolUpdateConfig(TimeInterval updateInterval) {
		this.updateInterval = updateInterval;
	}

	/**
	 * Time interval between cloud pool size updates.
	 *
	 * @return
	 */
	public TimeInterval getUpdateInterval() {
		return this.updateInterval;
	}

	@Override
	public int hashCode() {
		return Objects.hashCode(this.updateInterval);
	}

	@Override
	public boolean equals(Object obj) {
		if (obj instanceof PoolUpdateConfig) {
			PoolUpdateConfig that = (PoolUpdateConfig) obj;
			return Objects.equal(this.updateInterval, that.updateInterval);
		}
		return false;
	}

	@Override
	public String toString() {
		return JsonUtils.toPrettyString(JsonUtils.toJson(this));
	}

	public void validate() throws IllegalArgumentException {
		checkArgument(this.updateInterval != null,
				"poolUpdate: updateInterval missing");
		this.updateInterval.validate();
	}
}