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package javax.ws.rs;
import java.util.Date;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.RuntimeDelegate;
import static javax.ws.rs.core.HttpHeaders.RETRY_AFTER;
import static javax.ws.rs.core.Response.Status.SERVICE_UNAVAILABLE;
/**
* A runtime exception indicating that the requested resource
* {@link javax.ws.rs.core.Response.Status#SERVICE_UNAVAILABLE cannot be served}.
*
* @author Marek Potociar
* @since 2.0
*/
public class ServiceUnavailableException extends ServerErrorException {
private static final long serialVersionUID = 3821068205617492633L;
/**
* Construct a new "service unavailable" exception without any "Retry-After" information
* specified for the failed request.
*/
public ServiceUnavailableException() {
super(Response.status(SERVICE_UNAVAILABLE).build());
}
/**
* Construct a new "service unavailable" exception without any "Retry-After" information
* specified for the failed request.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
*/
public ServiceUnavailableException(String message) {
super(message, Response.status(SERVICE_UNAVAILABLE).build());
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request.
*
* @param retryAfter decimal interval in seconds after which the failed request may be retried.
*/
public ServiceUnavailableException(Long retryAfter) {
super(Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build());
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param retryAfter decimal interval in seconds after which the failed request may be retried.
*/
public ServiceUnavailableException(String message, Long retryAfter) {
super(message, Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build());
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request.
*
* @param retryAfter a date/time after which the failed request may be retried.
*/
public ServiceUnavailableException(Date retryAfter) {
super(Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build());
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param retryAfter a date/time after which the failed request may be retried.
*/
public ServiceUnavailableException(String message, Date retryAfter) {
super(message, Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build());
}
/**
* Construct a new "service unavailable" exception.
*
* @param response error response.
* @throws IllegalArgumentException in case the status code set in the response
* is not HTTP {@code 503}.
*/
public ServiceUnavailableException(Response response) {
super(validate(response, SERVICE_UNAVAILABLE));
}
/**
* Construct a new "service unavailable" exception.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param response error response.
* @throws IllegalArgumentException in case the status code set in the response
* is not HTTP {@code 503}.
*/
public ServiceUnavailableException(String message, Response response) {
super(message, validate(response, SERVICE_UNAVAILABLE));
}
/**
* Construct a new "service unavailable" exception with a date specifying
* the "Retry-After" information for the failed request and an underlying
* request failure cause.
*
* @param retryAfter a date/time after which the failed request may be retried.
* @param cause the underlying cause of the exception.
*/
public ServiceUnavailableException(Date retryAfter, Throwable cause) {
super(Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build(), cause);
}
/**
* Construct a new "service unavailable" exception with a date specifying
* the "Retry-After" information for the failed request and an underlying
* request failure cause.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param retryAfter a date/time after which the failed request may be retried.
* @param cause the underlying cause of the exception.
*/
public ServiceUnavailableException(String message, Date retryAfter, Throwable cause) {
super(message, Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build(), cause);
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request and an underlying
* request failure cause.
*
* @param retryAfter decimal interval in seconds after which the failed request may be retried.
* @param cause the underlying cause of the exception.
*/
public ServiceUnavailableException(Long retryAfter, Throwable cause) {
super(Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build(), cause);
}
/**
* Construct a new "service unavailable" exception with an interval specifying
* the "Retry-After" information for the failed request and an underlying
* request failure cause.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param retryAfter decimal interval in seconds after which the failed request may be retried.
* @param cause the underlying cause of the exception.
*/
public ServiceUnavailableException(String message, Long retryAfter, Throwable cause) {
super(message, Response.status(SERVICE_UNAVAILABLE).header(RETRY_AFTER, retryAfter).build(), cause);
}
/**
* Construct a new "service unavailable" exception.
*
* @param response error response.
* @param cause the underlying cause of the exception.
* @throws IllegalArgumentException in case the status code set in the response
* is not HTTP {@code 503}.
*/
public ServiceUnavailableException(Response response, Throwable cause) {
super(validate(response, SERVICE_UNAVAILABLE), cause);
}
/**
* Construct a new "service unavailable" exception.
*
* @param message the detail message (which is saved for later retrieval
* by the {@link #getMessage()} method).
* @param response error response.
* @param cause the underlying cause of the exception.
* @throws IllegalArgumentException in case the status code set in the response
* is not HTTP {@code 503}.
*/
public ServiceUnavailableException(String message, Response response, Throwable cause) {
super(message, validate(response, SERVICE_UNAVAILABLE), cause);
}
/**
* Check if the underlying response contains the information on when is it
* possible to {@link HttpHeaders#RETRY_AFTER retry the request}.
*
* @return {@code true} in case the retry time is specified in the underlying
* response, {@code false} otherwise.
*/
public boolean hasRetryAfter() {
return getResponse().getHeaders().containsKey(RETRY_AFTER);
}
/**
* Get the retry time for the failed request.
*
* @param requestTime time of sending the original request that may be used to compute
* the retry time (in case the retry time information specified as
* a decimal interval in seconds).
* @return time when the request may be retried or {@code null} if there is no retry
* information available.
* @throws NullPointerException in case the {@code requestTime} parameter is {@code null}.
*/
public Date getRetryTime(final Date requestTime) {
final String value = getResponse().getHeaderString(RETRY_AFTER);
if (value == null) {
return null;
}
try {
Long interval = Long.parseLong(value);
return new Date(requestTime.getTime() + interval * 1000);
} catch (NumberFormatException ex) {
// not an decimal value; ignoring exception and parsing as date
}
final RuntimeDelegate.HeaderDelegate dateDelegate =
RuntimeDelegate.getInstance().createHeaderDelegate(Date.class);
return dateDelegate.fromString(value);
}
}
