net.snowflake.client.jdbc.telemetry.TelemetryClient Maven / Gradle / Ivy
/*
* Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
*/
package net.snowflake.client.jdbc.telemetry;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.io.IOException;
import java.rmi.UnexpectedException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.LinkedList;
import java.util.concurrent.Future;
import net.snowflake.client.core.HttpUtil;
import net.snowflake.client.core.ObjectMapperFactory;
import net.snowflake.client.core.SFBaseSession;
import net.snowflake.client.core.SFSession;
import net.snowflake.client.jdbc.SnowflakeConnectionV1;
import net.snowflake.client.jdbc.SnowflakeSQLException;
import net.snowflake.client.jdbc.telemetryOOB.TelemetryThreadPool;
import net.snowflake.client.log.SFLogger;
import net.snowflake.client.log.SFLoggerFactory;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
/**
* Copyright (c) 2018-2019 Snowflake Computing Inc. All rights reserved.
*
* Telemetry Service Interface
*/
public class TelemetryClient implements Telemetry {
private static final SFLogger logger = SFLoggerFactory.getLogger(SFBaseSession.class);
private static final String SF_PATH_TELEMETRY = "/telemetry/send";
// if the number of cached logs is larger than this threshold,
// the telemetry connector will flush the buffer automatically.
private final int forceFlushSize;
private static final int DEFAULT_FORCE_FLUSH_SIZE = 100;
private final String serverUrl;
private final String telemetryUrl;
private final SFSession session;
private LinkedList logBatch;
private static final ObjectMapper mapper = ObjectMapperFactory.getObjectMapper();
private boolean isClosed;
private Object locker = new Object();
// false if meet any error when sending metrics
private boolean isTelemetryServiceAvailable = true;
private TelemetryClient(SFSession session, int flushSize) {
this.session = session;
this.serverUrl = session.getUrl();
if (this.serverUrl.endsWith("/")) {
this.telemetryUrl =
this.serverUrl.substring(0, this.serverUrl.length() - 1) + SF_PATH_TELEMETRY;
} else {
this.telemetryUrl = this.serverUrl + SF_PATH_TELEMETRY;
}
this.logBatch = new LinkedList<>();
this.isClosed = false;
this.forceFlushSize = flushSize;
}
/**
* Return whether the client can be used to add/send metrics
*
* @return whether client is enabled
*/
public boolean isTelemetryEnabled() {
return this.session.isClientTelemetryEnabled() && this.isTelemetryServiceAvailable;
}
/** Disable any use of the client to add/send metrics */
public void disableTelemetry() {
this.isTelemetryServiceAvailable = false;
}
/**
* Initialize the telemetry connector
*
* @param conn connection with the session to use for the connector
* @param flushSize maximum size of telemetry batch before flush
* @return a telemetry connector
*/
public static Telemetry createTelemetry(Connection conn, int flushSize) {
try {
return createTelemetry(
(SFSession) conn.unwrap(SnowflakeConnectionV1.class).getSFBaseSession(), flushSize);
} catch (SQLException ex) {
logger.debug("input connection is not a SnowflakeConnection");
return null;
}
}
/**
* Initialize the telemetry connector
*
* @param conn connection with the session to use for the connector
* @return a telemetry connector
*/
public static Telemetry createTelemetry(Connection conn) {
return createTelemetry(conn, DEFAULT_FORCE_FLUSH_SIZE);
}
/**
* Initialize the telemetry connector
*
* @param session session to use for telemetry dumps
* @return a telemetry connector
*/
public static Telemetry createTelemetry(SFSession session) {
return createTelemetry(session, DEFAULT_FORCE_FLUSH_SIZE);
}
/**
* Initialize the telemetry connector
*
* @param session session to use for telemetry dumps
* @param flushSize maximum size of telemetry batch before flush
* @return a telemetry connector
*/
public static Telemetry createTelemetry(SFSession session, int flushSize) {
return new TelemetryClient(session, flushSize);
}
/**
* Add log to batch to be submitted to telemetry. Send batch if forceFlushSize reached
*
* @param log entry to add
*/
@Override
public void addLogToBatch(TelemetryData log) {
if (isClosed) {
logger.debug("Telemetry already closed");
return;
}
if (!isTelemetryEnabled()) {
return; // if disable, do nothing
}
synchronized (locker) {
this.logBatch.add(log);
}
if (this.logBatch.size() >= this.forceFlushSize) {
this.sendBatchAsync();
}
}
/**
* Add log to batch to be submitted to telemetry. Send batch if forceFlushSize reached
*
* @param message json node of log
* @param timeStamp timestamp to use for log
*/
public void addLogToBatch(ObjectNode message, long timeStamp) {
this.addLogToBatch(new TelemetryData(message, timeStamp));
}
/** Close telemetry connector and send any unsubmitted logs */
@Override
public void close() {
if (isClosed) {
logger.debug("Telemetry client already closed");
return;
}
try {
// sendBatch when close is synchronous, otherwise client might be closed
// before data was sent.
sendBatchAsync().get();
} catch (Throwable e) {
logger.debug("Error when sending batch data, {}", e);
} finally {
this.isClosed = true;
}
}
/**
* Return whether the client has been closed
*
* @return whether client is closed
*/
public boolean isClosed() {
return this.isClosed;
}
@Override
public Future sendBatchAsync() {
return TelemetryThreadPool.getInstance()
.submit(
() -> {
try {
return this.sendBatch();
} catch (Throwable e) {
logger.debug("Failed to send telemetry data, {}", e);
return false;
}
});
}
@Override
public void postProcess(String queryId, String sqlState, int vendorCode, Throwable ex) {
// This is a no-op.
}
/**
* Send all cached logs to server
*
* @return whether the logs were sent successfully
* @throws IOException if closed or uploading batch fails
*/
private boolean sendBatch() throws IOException {
if (isClosed) {
throw new IOException("Telemetry connector is closed");
}
if (!isTelemetryEnabled()) {
return false;
}
LinkedList tmpList;
synchronized (locker) {
tmpList = this.logBatch;
this.logBatch = new LinkedList<>();
}
if (session.isClosed()) {
throw new UnexpectedException("Session is closed when sending log");
}
if (!tmpList.isEmpty()) {
// session shared with JDBC
String sessionToken = this.session.getSessionToken();
String payload = logsToString(tmpList);
logger.debugNoMask("Payload of telemetry is : " + payload);
HttpPost post = new HttpPost(this.telemetryUrl);
post.setEntity(new StringEntity(payload));
post.setHeader("Content-type", "application/json");
post.setHeader("Authorization", "Snowflake Token=\"" + sessionToken + "\"");
String response = null;
try {
response = HttpUtil.executeGeneralRequest(post, 1000, this.session.getHttpClientKey());
} catch (SnowflakeSQLException e) {
disableTelemetry(); // when got error like 404 or bad request, disable telemetry in this
// telemetry instance
logger.error(
"Telemetry request failed, " + "response: {}, exception: {}", response, e.getMessage());
return false;
}
}
return true;
}
/**
* Send a log to the server, along with any existing logs waiting to be sent
*
* @param log entry to send
* @return whether the logs were sent successfully
* @throws IOException if closed or uploading batch fails
*/
public boolean sendLog(TelemetryData log) throws IOException {
addLogToBatch(log);
return sendBatch();
}
/**
* Send a log to the server, along with any existing logs waiting to be sent
*
* @param message json node of log
* @param timeStamp timestamp to use for log
* @return whether the logs were sent successfully
* @throws IOException if closed or uploading batch fails
*/
public boolean sendLog(ObjectNode message, long timeStamp) throws IOException {
return this.sendLog(new TelemetryData(message, timeStamp));
}
/**
* convert a list of log to a JSON object
*
* @param telemetryData a list of log
* @return the result json string
*/
static ObjectNode logsToJson(LinkedList telemetryData) {
ObjectNode node = mapper.createObjectNode();
ArrayNode logs = mapper.createArrayNode();
for (TelemetryData data : telemetryData) {
logs.add(data.toJson());
}
node.set("logs", logs);
return node;
}
/**
* convert a list of log to a JSON String
*
* @param telemetryData a list of log
* @return the result json string
*/
static String logsToString(LinkedList telemetryData) {
return logsToJson(telemetryData).toString();
}
/**
* For test use only
*
* @return the number of cached logs
*/
public int bufferSize() {
return this.logBatch.size();
}
/**
* For test use only
*
* @return a copy of the logs currently in the buffer
*/
public LinkedList logBuffer() {
return new LinkedList<>(this.logBatch);
}
}