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package com.github.dockerjava.api.model;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.EqualsAndHashCode;
import java.io.Serializable;
import static java.util.Objects.requireNonNull;
/**
* Container restart policy
*
* <dl>
* <dt>no</dt>
* <dd>Do not restart the container if it dies. (default)</dd>
*
* <dt>on-failure</dt>
* <dd>Restart the container if it exits with a non-zero exit code. Can also accept an optional maximum restart count (e.g. on-failure:5).
* <dd>
*
* <dt>always</dt>
* <dd>Always restart the container no matter what exit code is returned.
* <dd>
* </dl>
*
* @author Marcus Linke
*
*/
@EqualsAndHashCode
public class RestartPolicy implements Serializable {
private static final long serialVersionUID = 1L;
@JsonProperty("MaximumRetryCount")
private Integer maximumRetryCount = 0;
@JsonProperty("Name")
private String name = "";
public RestartPolicy() {
}
private RestartPolicy(int maximumRetryCount, String name) {
requireNonNull(name, "name is null");
this.maximumRetryCount = maximumRetryCount;
this.name = name;
}
/**
* Do not restart the container if it dies. (default)
*/
public static RestartPolicy noRestart() {
return new RestartPolicy();
}
/**
* Always restart the container no matter what exit code is returned.
*/
public static RestartPolicy alwaysRestart() {
return new RestartPolicy(0, "always");
}
/**
* Restart the container if it exits with a non-zero exit code.
*
* @param maximumRetryCount
* the maximum number of restarts. Set to <code>0</code> for unlimited retries.
*/
public static RestartPolicy onFailureRestart(int maximumRetryCount) {
return new RestartPolicy(maximumRetryCount, "on-failure");
}
/**
* Restart the container unless it has been stopped
*/
public static RestartPolicy unlessStoppedRestart() {
return new RestartPolicy(0, "unless-stopped");
}
public Integer getMaximumRetryCount() {
return maximumRetryCount;
}
public String getName() {
return name;
}
/**
* Parses a textual restart polixy specification (as used by the Docker CLI) to a {@link RestartPolicy}.
*
* @param serialized
* the specification, e.g. <code>on-failure:2</code>
* @return a {@link RestartPolicy} matching the specification
* @throws IllegalArgumentException
* if the specification cannot be parsed
*/
public static RestartPolicy parse(String serialized) throws IllegalArgumentException {
try {
String[] parts = serialized.split(":");
String name = parts[0];
if ("no".equals(name)) {
return noRestart();
}
if ("always".equals(name)) {
return alwaysRestart();
}
if ("unless-stopped".equals(name)) {
return unlessStoppedRestart();
}
if ("on-failure".equals(name)) {
int count = 0;
if (parts.length == 2) {
count = Integer.parseInt(parts[1]);
}
return onFailureRestart(count);
}
throw new IllegalArgumentException();
} catch (Exception e) {
throw new IllegalArgumentException("Error parsing RestartPolicy '" + serialized + "'");
}
}
/**
* Returns a string representation of this {@link RestartPolicy}. The format is <code>name[:count]</code>, like the argument in
* {@link #parse(String)}.
*
* @return a string representation of this {@link RestartPolicy}
*/
@Override
public String toString() {
String result = name.isEmpty() ? "no" : name;
return maximumRetryCount > 0 ? result + ":" + maximumRetryCount : result;
}
}