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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hive.jdbc;
import java.net.URI;
import java.net.URISyntaxException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hive.service.cli.HiveSQLException;
import org.apache.hive.service.cli.thrift.TStatus;
import org.apache.hive.service.cli.thrift.TStatusCode;
public class Utils {
public static final Log LOG = LogFactory.getLog(Utils.class.getName());
/**
* The required prefix for the connection URL.
*/
public static final String URL_PREFIX = "jdbc:hive2://";
/**
* If host is provided, without a port.
*/
public static final String DEFAULT_PORT = "10000";
/**
* Hive's default database name
*/
public static final String DEFAULT_DATABASE = "default";
private static final String URI_JDBC_PREFIX = "jdbc:";
private static final String URI_HIVE_PREFIX = "hive2:";
public static class JdbcConnectionParams {
// Note on client side parameter naming convention:
// Prefer using a shorter camelCase param name instead of using the same name as the
// corresponding
// HiveServer2 config.
// For a jdbc url: jdbc:hive2://:/dbName;sess_var_list?hive_conf_list#hive_var_list,
// client side params are specified in sess_var_list
// Client param names:
static final String AUTH_TYPE = "auth";
// We're deprecating this variable's name.
static final String AUTH_QOP_DEPRECATED = "sasl.qop";
static final String AUTH_QOP = "saslQop";
static final String AUTH_SIMPLE = "noSasl";
static final String AUTH_TOKEN = "delegationToken";
static final String AUTH_USER = "user";
static final String AUTH_PRINCIPAL = "principal";
static final String AUTH_PASSWD = "password";
static final String AUTH_KERBEROS_AUTH_TYPE = "kerberosAuthType";
static final String AUTH_KERBEROS_AUTH_TYPE_FROM_SUBJECT = "fromSubject";
static final String ANONYMOUS_USER = "anonymous";
static final String ANONYMOUS_PASSWD = "anonymous";
static final String USE_SSL = "ssl";
static final String SSL_TRUST_STORE = "sslTrustStore";
static final String SSL_TRUST_STORE_PASSWORD = "trustStorePassword";
// We're deprecating the name and placement of this in the parsed map (from hive conf vars to
// hive session vars).
static final String TRANSPORT_MODE_DEPRECATED = "hive.server2.transport.mode";
static final String TRANSPORT_MODE = "transportMode";
// We're deprecating the name and placement of this in the parsed map (from hive conf vars to
// hive session vars).
static final String HTTP_PATH_DEPRECATED = "hive.server2.thrift.http.path";
static final String HTTP_PATH = "httpPath";
static final String SERVICE_DISCOVERY_MODE = "serviceDiscoveryMode";
// Don't use dynamic serice discovery
static final String SERVICE_DISCOVERY_MODE_NONE = "none";
// Use ZooKeeper for indirection while using dynamic service discovery
static final String SERVICE_DISCOVERY_MODE_ZOOKEEPER = "zooKeeper";
static final String ZOOKEEPER_NAMESPACE = "zooKeeperNamespace";
// Default namespace value on ZooKeeper.
// This value is used if the param "zooKeeperNamespace" is not specified in the JDBC Uri.
static final String ZOOKEEPER_DEFAULT_NAMESPACE = "hiveserver2";
// Non-configurable params:
// Currently supports JKS keystore format
static final String SSL_TRUST_STORE_TYPE = "JKS";
private String host = null;
private int port;
private String jdbcUriString;
private String dbName = DEFAULT_DATABASE;
private Map hiveConfs = new LinkedHashMap();
private Map hiveVars = new LinkedHashMap();
private Map sessionVars = new LinkedHashMap();
private boolean isEmbeddedMode = false;
private String[] authorityList;
private String zooKeeperEnsemble = null;
private String currentHostZnodePath;
private List rejectedHostZnodePaths = new ArrayList();
public JdbcConnectionParams() {
}
public String getHost() {
return host;
}
public int getPort() {
return port;
}
public String getJdbcUriString() {
return jdbcUriString;
}
public String getDbName() {
return dbName;
}
public Map getHiveConfs() {
return hiveConfs;
}
public Map getHiveVars() {
return hiveVars;
}
public boolean isEmbeddedMode() {
return isEmbeddedMode;
}
public Map getSessionVars() {
return sessionVars;
}
public String[] getAuthorityList() {
return authorityList;
}
public String getZooKeeperEnsemble() {
return zooKeeperEnsemble;
}
public List getRejectedHostZnodePaths() {
return rejectedHostZnodePaths;
}
public String getCurrentHostZnodePath() {
return currentHostZnodePath;
}
public void setHost(String host) {
this.host = host;
}
public void setPort(int port) {
this.port = port;
}
public void setJdbcUriString(String jdbcUriString) {
this.jdbcUriString = jdbcUriString;
}
public void setDbName(String dbName) {
this.dbName = dbName;
}
public void setHiveConfs(Map hiveConfs) {
this.hiveConfs = hiveConfs;
}
public void setHiveVars(Map hiveVars) {
this.hiveVars = hiveVars;
}
public void setEmbeddedMode(boolean embeddedMode) {
this.isEmbeddedMode = embeddedMode;
}
public void setSessionVars(Map sessionVars) {
this.sessionVars = sessionVars;
}
public void setSuppliedAuthorityList(String[] authorityList) {
this.authorityList = authorityList;
}
public void setZooKeeperEnsemble(String zooKeeperEnsemble) {
this.zooKeeperEnsemble = zooKeeperEnsemble;
}
public void setCurrentHostZnodePath(String currentHostZnodePath) {
this.currentHostZnodePath = currentHostZnodePath;
}
}
// Verify success or success_with_info status, else throw SQLException
public static void verifySuccessWithInfo(TStatus status) throws SQLException {
verifySuccess(status, true);
}
// Verify success status, else throw SQLException
public static void verifySuccess(TStatus status) throws SQLException {
verifySuccess(status, false);
}
// Verify success and optionally with_info status, else throw SQLException
public static void verifySuccess(TStatus status, boolean withInfo) throws SQLException {
if (status.getStatusCode() == TStatusCode.SUCCESS_STATUS ||
(withInfo && status.getStatusCode() == TStatusCode.SUCCESS_WITH_INFO_STATUS)) {
return;
}
throw new HiveSQLException(status);
}
/**
* Parse JDBC connection URL
* The new format of the URL is:
* jdbc:hive2://:,:/dbName;sess_var_list?hive_conf_list#hive_var_list
* where the optional sess, conf and var lists are semicolon separated = pairs.
* For utilizing dynamic service discovery with HiveServer2 multiple comma separated host:port pairs can
* be specified as shown above.
* The JDBC driver resolves the list of uris and picks a specific server instance to connect to.
* Currently, dynamic service discovery using ZooKeeper is supported, in which case the host:port pairs represent a ZooKeeper ensemble.
*
* As before, if the host/port is not specified, it the driver runs an embedded hive.
* examples -
* jdbc:hive2://ubuntu:11000/db2?hive.cli.conf.printheader=true;hive.exec.mode.local.auto.inputbytes.max=9999#stab=salesTable;icol=customerID
* jdbc:hive2://?hive.cli.conf.printheader=true;hive.exec.mode.local.auto.inputbytes.max=9999#stab=salesTable;icol=customerID
* jdbc:hive2://ubuntu:11000/db2;user=foo;password=bar
*
* Connect to http://server:10001/hs2, with specified basicAuth credentials and initial database:
* jdbc:hive2://server:10001/db;user=foo;password=bar?hive.server2.transport.mode=http;hive.server2.thrift.http.path=hs2
*
* @param uri
* @return
* @throws SQLException
*/
public static JdbcConnectionParams parseURL(String uri) throws JdbcUriParseException,
SQLException, ZooKeeperHiveClientException {
JdbcConnectionParams connParams = new JdbcConnectionParams();
if (!uri.startsWith(URL_PREFIX)) {
throw new JdbcUriParseException("Bad URL format: Missing prefix " + URL_PREFIX);
}
// For URLs with no other configuration
// Don't parse them, but set embedded mode as true
if (uri.equalsIgnoreCase(URL_PREFIX)) {
connParams.setEmbeddedMode(true);
return connParams;
}
// The JDBC URI now supports specifying multiple host:port if dynamic service discovery is
// configured on HiveServer2 (like: host1:port1,host2:port2,host3:port3)
// We'll extract the authorities (host:port combo) from the URI, extract session vars, hive
// confs & hive vars by parsing it as a Java URI.
// To parse the intermediate URI as a Java URI, we'll give a dummy authority(dummy:00000).
// Later, we'll substitute the dummy authority for a resolved authority.
String dummyAuthorityString = "dummyhost:00000";
String suppliedAuthorities = getAuthorities(uri, connParams);
if ((suppliedAuthorities == null) || (suppliedAuthorities.isEmpty())) {
// Given uri of the form:
// jdbc:hive2:///dbName;sess_var_list?hive_conf_list#hive_var_list
connParams.setEmbeddedMode(true);
} else {
LOG.info("Supplied authorities: " + suppliedAuthorities);
String[] authorityList = suppliedAuthorities.split(",");
connParams.setSuppliedAuthorityList(authorityList);
uri = uri.replace(suppliedAuthorities, dummyAuthorityString);
}
// Now parse the connection uri with dummy authority
URI jdbcURI = URI.create(uri.substring(URI_JDBC_PREFIX.length()));
// key=value pattern
Pattern pattern = Pattern.compile("([^;]*)=([^;]*)[;]?");
// dbname and session settings
String sessVars = jdbcURI.getPath();
if ((sessVars != null) && !sessVars.isEmpty()) {
String dbName = "";
// removing leading '/' returned by getPath()
sessVars = sessVars.substring(1);
if (!sessVars.contains(";")) {
// only dbname is provided
dbName = sessVars;
} else {
// we have dbname followed by session parameters
dbName = sessVars.substring(0, sessVars.indexOf(';'));
sessVars = sessVars.substring(sessVars.indexOf(';') + 1);
if (sessVars != null) {
Matcher sessMatcher = pattern.matcher(sessVars);
while (sessMatcher.find()) {
if (connParams.getSessionVars().put(sessMatcher.group(1), sessMatcher.group(2)) != null) {
throw new JdbcUriParseException("Bad URL format: Multiple values for property "
+ sessMatcher.group(1));
}
}
}
}
if (!dbName.isEmpty()) {
connParams.setDbName(dbName);
}
}
// parse hive conf settings
String confStr = jdbcURI.getQuery();
if (confStr != null) {
Matcher confMatcher = pattern.matcher(confStr);
while (confMatcher.find()) {
connParams.getHiveConfs().put(confMatcher.group(1), confMatcher.group(2));
}
}
// parse hive var settings
String varStr = jdbcURI.getFragment();
if (varStr != null) {
Matcher varMatcher = pattern.matcher(varStr);
while (varMatcher.find()) {
connParams.getHiveVars().put(varMatcher.group(1), varMatcher.group(2));
}
}
// Handle all deprecations here:
String newUsage;
String usageUrlBase = "jdbc:hive2://:/dbName;";
// Handle deprecation of AUTH_QOP_DEPRECATED
newUsage = usageUrlBase + JdbcConnectionParams.AUTH_QOP + "=";
handleParamDeprecation(connParams.getSessionVars(), connParams.getSessionVars(),
JdbcConnectionParams.AUTH_QOP_DEPRECATED, JdbcConnectionParams.AUTH_QOP, newUsage);
// Handle deprecation of TRANSPORT_MODE_DEPRECATED
newUsage = usageUrlBase + JdbcConnectionParams.TRANSPORT_MODE + "=";
handleParamDeprecation(connParams.getHiveConfs(), connParams.getSessionVars(),
JdbcConnectionParams.TRANSPORT_MODE_DEPRECATED, JdbcConnectionParams.TRANSPORT_MODE,
newUsage);
// Handle deprecation of HTTP_PATH_DEPRECATED
newUsage = usageUrlBase + JdbcConnectionParams.HTTP_PATH + "=";
handleParamDeprecation(connParams.getHiveConfs(), connParams.getSessionVars(),
JdbcConnectionParams.HTTP_PATH_DEPRECATED, JdbcConnectionParams.HTTP_PATH, newUsage);
// Extract host, port
if (connParams.isEmbeddedMode()) {
// In case of embedded mode we were supplied with an empty authority.
// So we never substituted the authority with a dummy one.
connParams.setHost(jdbcURI.getHost());
connParams.setPort(jdbcURI.getPort());
} else {
// Else substitute the dummy authority with a resolved one.
// In case of dynamic service discovery using ZooKeeper, it picks a server uri from ZooKeeper
String resolvedAuthorityString = resolveAuthority(connParams);
LOG.info("Resolved authority: " + resolvedAuthorityString);
uri = uri.replace(dummyAuthorityString, resolvedAuthorityString);
connParams.setJdbcUriString(uri);
// Create a Java URI from the resolved URI for extracting the host/port
URI resolvedAuthorityURI = null;
try {
resolvedAuthorityURI = new URI(null, resolvedAuthorityString, null, null, null);
} catch (URISyntaxException e) {
throw new JdbcUriParseException("Bad URL format: ", e);
}
connParams.setHost(resolvedAuthorityURI.getHost());
connParams.setPort(resolvedAuthorityURI.getPort());
}
return connParams;
}
/**
* Remove the deprecatedName param from the fromMap and put the key value in the toMap.
* Also log a deprecation message for the client.
* @param fromMap
* @param toMap
* @param oldName
* @param newName
*/
private static void handleParamDeprecation(Map fromMap, Map toMap,
String deprecatedName, String newName, String newUsage) {
if (fromMap.containsKey(deprecatedName)) {
LOG.warn("***** JDBC param deprecation *****");
LOG.warn("The use of " + deprecatedName + " is deprecated.");
LOG.warn("Please use " + newName +" like so: " + newUsage);
String paramValue = fromMap.remove(deprecatedName);
toMap.put(newName, paramValue);
}
}
/**
* Get the authority string from the supplied uri, which could potentially contain multiple
* host:port pairs.
*
* @param uri
* @param connParams
* @return
* @throws JdbcUriParseException
*/
private static String getAuthorities(String uri, JdbcConnectionParams connParams)
throws JdbcUriParseException {
String authorities;
/**
* For a jdbc uri like:
* jdbc:hive2://:,:/dbName;sess_var_list?conf_list#var_list
* Extract the uri host:port list starting after "jdbc:hive2://",
* till the 1st "/" or "?" or "#" whichever comes first & in the given order
* Examples:
* jdbc:hive2://host1:port1,host2:port2,host3:port3/db;k1=v1?k2=v2#k3=v3
* jdbc:hive2://host1:port1,host2:port2,host3:port3/;k1=v1?k2=v2#k3=v3
* jdbc:hive2://host1:port1,host2:port2,host3:port3?k2=v2#k3=v3
* jdbc:hive2://host1:port1,host2:port2,host3:port3#k3=v3
*/
int fromIndex = Utils.URL_PREFIX.length();
int toIndex = -1;
ArrayList toIndexChars = new ArrayList(Arrays.asList("/", "?", "#"));
for (String toIndexChar : toIndexChars) {
toIndex = uri.indexOf(toIndexChar, fromIndex);
if (toIndex > 0) {
break;
}
}
if (toIndex < 0) {
authorities = uri.substring(fromIndex);
} else {
authorities = uri.substring(fromIndex, toIndex);
}
return authorities;
}
/**
* Get a string representing a specific host:port
* @param connParams
* @return
* @throws JdbcUriParseException
* @throws ZooKeeperHiveClientException
*/
private static String resolveAuthority(JdbcConnectionParams connParams)
throws JdbcUriParseException, ZooKeeperHiveClientException {
String serviceDiscoveryMode =
connParams.getSessionVars().get(JdbcConnectionParams.SERVICE_DISCOVERY_MODE);
if ((serviceDiscoveryMode != null)
&& (JdbcConnectionParams.SERVICE_DISCOVERY_MODE_ZOOKEEPER
.equalsIgnoreCase(serviceDiscoveryMode))) {
// Resolve using ZooKeeper
return resolveAuthorityUsingZooKeeper(connParams);
} else {
String authority = connParams.getAuthorityList()[0];
URI jdbcURI = URI.create(URI_HIVE_PREFIX + "//" + authority);
// Check to prevent unintentional use of embedded mode. A missing "/"
// to separate the 'path' portion of URI can result in this.
// The missing "/" common typo while using secure mode, eg of such url -
// jdbc:hive2://localhost:10000;principal=hive/[email protected]
if ((jdbcURI.getAuthority() != null) && (jdbcURI.getHost() == null)) {
throw new JdbcUriParseException("Bad URL format. Hostname not found "
+ " in authority part of the url: " + jdbcURI.getAuthority()
+ ". Are you missing a '/' after the hostname ?");
}
// Return the 1st element of the array
return jdbcURI.getAuthority();
}
}
/**
* Read a specific host:port from ZooKeeper
* @param connParams
* @return
* @throws ZooKeeperHiveClientException
*/
private static String resolveAuthorityUsingZooKeeper(JdbcConnectionParams connParams)
throws ZooKeeperHiveClientException {
// Set ZooKeeper ensemble in connParams for later use
connParams.setZooKeeperEnsemble(joinStringArray(connParams.getAuthorityList(), ","));
return ZooKeeperHiveClientHelper.getNextServerUriFromZooKeeper(connParams);
}
/**
* Read the next server coordinates (host:port combo) from ZooKeeper. Ignore the znodes already
* explored. Also update the host, port, jdbcUriString fields of connParams.
*
* @param connParams
* @throws ZooKeeperHiveClientException
*/
static void updateConnParamsFromZooKeeper(JdbcConnectionParams connParams)
throws ZooKeeperHiveClientException {
// Add current host to the rejected list
connParams.getRejectedHostZnodePaths().add(connParams.getCurrentHostZnodePath());
// Get another HiveServer2 uri from ZooKeeper
String serverUriString = ZooKeeperHiveClientHelper.getNextServerUriFromZooKeeper(connParams);
// Parse serverUri to a java URI and extract host, port
URI serverUri = null;
try {
// Note URL_PREFIX is not a valid scheme format, therefore leaving it null in the constructor
// to construct a valid URI
serverUri = new URI(null, serverUriString, null, null, null);
} catch (URISyntaxException e) {
throw new ZooKeeperHiveClientException(e);
}
String oldServerHost = connParams.getHost();
int oldServerPort = connParams.getPort();
String newServerHost = serverUri.getHost();
int newServerPort = serverUri.getPort();
connParams.setHost(newServerHost);
connParams.setPort(newServerPort);
connParams.setJdbcUriString(connParams.getJdbcUriString().replace(
oldServerHost + ":" + oldServerPort, newServerHost + ":" + newServerPort));
}
private static String joinStringArray(String[] stringArray, String seperator) {
StringBuilder stringBuilder = new StringBuilder();
for (int cur = 0, end = stringArray.length; cur < end; cur++) {
if (cur > 0) {
stringBuilder.append(seperator);
}
stringBuilder.append(stringArray[cur]);
}
return stringBuilder.toString();
}
/**
* Takes a version string delimited by '.' and '-' characters
* and returns a partial version.
*
* @param fullVersion
* version string.
* @param position
* position of version string to get starting at 0. eg, for a X.x.xxx
* string, 0 will return the major version, 1 will return minor
* version.
* @return version part, or -1 if version string was malformed.
*/
static int getVersionPart(String fullVersion, int position) {
int version = -1;
try {
String[] tokens = fullVersion.split("[\\.-]"); //$NON-NLS-1$
if (tokens != null && tokens.length > 1 && tokens[position] != null) {
version = Integer.parseInt(tokens[position]);
}
} catch (Exception e) {
version = -1;
}
return version;
}
}
