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package ru.yandex.clickhouse.except;
import org.apache.http.conn.ConnectTimeoutException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ru.yandex.clickhouse.util.apache.StringUtils;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
/**
* Specify ClickHouse exception to ClickHouseException and fill it with a vendor code.
*/
public final class ClickHouseExceptionSpecifier {
private static final Logger log = LoggerFactory.getLogger(ClickHouseExceptionSpecifier.class);
private ClickHouseExceptionSpecifier() {
}
public static ClickHouseException specify(Throwable cause, String host, int port) {
return specify(null, cause, host, port);
}
public static ClickHouseException specify(String clickHouseMessage, String host, int port) {
return specify(clickHouseMessage, null, host, port);
}
/**
* Here we expect the ClickHouse error message to be of the following format:
* "Code: 10, e.displayText() = DB::Exception: ...".
*/
public static ClickHouseException specify(String clickHouseMessage, Throwable cause, String host, int port) {
if (StringUtils.isEmpty(clickHouseMessage) && cause != null) {
if (cause instanceof SocketTimeoutException)
// if we've got SocketTimeoutException, we'll say that the query is not good. This is not the same as SOCKET_TIMEOUT of clickhouse
// but it actually could be a failing ClickHouse
return new ClickHouseException(ClickHouseErrorCode.TIMEOUT_EXCEEDED.code, cause, host, port);
else if (cause instanceof ConnectTimeoutException || cause instanceof ConnectException)
// couldn't connect to ClickHouse during connectTimeout
return new ClickHouseException(ClickHouseErrorCode.NETWORK_ERROR.code, cause, host, port);
else
return new ClickHouseUnknownException(cause, host, port);
}
try {
int code;
if(clickHouseMessage.startsWith("Poco::Exception. Code: 1000, ")) {
code = 1000;
} else {
// Code: 175, e.displayText() = DB::Exception:
code = Integer.parseInt(clickHouseMessage.substring(clickHouseMessage.indexOf(' ') + 1, clickHouseMessage.indexOf(',')));
}
// ошибку в изначальном виде все-таки укажем
Throwable messageHolder = cause != null ? cause : new Throwable(clickHouseMessage);
return new ClickHouseException(code, messageHolder, host, port);
} catch (Exception e) {
log.error("Unsupported ClickHouse error format, please fix ClickHouseExceptionSpecifier, message: "
+ clickHouseMessage + ", error: " + e.getMessage());
return new ClickHouseUnknownException(clickHouseMessage, cause, host, port);
}
}
private interface ClickHouseExceptionFactory {
ClickHouseException create(Integer code, Throwable cause, String host, int port);
}
}
