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Unified Java client for ClickHouse
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package com.clickhouse.client.config;
import java.io.Serializable;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import com.clickhouse.config.ClickHouseOption;
import com.clickhouse.data.ClickHouseChecker;
import com.clickhouse.data.ClickHouseCompression;
import com.clickhouse.data.ClickHouseDataConfig;
/**
* Generic client options.
*/
public enum ClickHouseClientOption implements ClickHouseOption {
/**
* Whether the client should run in async mode(e.g.
* {@link com.clickhouse.client.ClickHouseClient#execute(com.clickhouse.client.ClickHouseRequest)}
* in a separate thread).
*/
ASYNC("async", ClickHouseDataConfig.DEFAULT_ASYNC, "Whether the client should run in async mode."),
/**
* Whether the client should discover more nodes from system tables and/or
* clickhouse-keeper/zookeeper.
*/
AUTO_DISCOVERY("auto_discovery", false,
"Whether the client should discover more nodes from system tables and/or clickhouse-keeper/zookeeper."),
/**
* Custom server settings for all queries.
*/
CUSTOM_SETTINGS("custom_settings", "", "Comma separated custom server settings for all queries."),
/**
* Custom socket factory.
*/
CUSTOM_SOCKET_FACTORY("custom_socket_factory", "",
"Full qualified class name of custom socket factory. This is only supported by TCP client and Apache Http Client."),
/**
* Additional socket factory options. Only useful only when
* {@link #CUSTOM_SOCKET_FACTORY} is set.
*/
CUSTOM_SOCKET_FACTORY_OPTIONS("custom_socket_factory_options", "",
"Comma separated options for custom socket factory."),
/**
* Load balancing policy.
*/
LOAD_BALANCING_POLICY("load_balancing_policy", "",
"Load balancing policy, can be one of '', 'firstAlive', 'random', 'roundRobin', or full qualified class name implementing ClickHouseLoadBalancingPolicy."),
/**
* Load balancing tags for filtering out nodes.
*/
LOAD_BALANCING_TAGS("load_balancing_tags", "", "Load balancing tags for filtering out nodes."),
/**
* Health check interval in milliseconds.
*/
HEALTH_CHECK_INTERVAL("health_check_interval", 0,
"Health check interval in milliseconds, zero or negative value means one-time."),
/**
* Health check method.
*/
HEALTH_CHECK_METHOD("health_check_method", ClickHouseHealthCheckMethod.SELECT_ONE, "Health check method."),
/**
* Node discovery interval in milliseconds.
*/
NODE_DISCOVERY_INTERVAL("node_discovery_interval", 0,
"Node discovery interval in milliseconds, zero or negative value means one-time discovery."),
/**
* Maximum number of nodes can be discovered at a time.
*/
NODE_DISCOVERY_LIMIT("node_discovery_limit", 100,
"Maximum number of nodes can be discovered at a time, zero or negative value means no limit."),
/**
* Node check interval in milliseconds.
*/
NODE_CHECK_INTERVAL("node_check_interval", 0,
"Node check interval in milliseconds, negative number is treated as zero."),
/**
* Maximum number of nodes can be used for operation at a time.
*/
NODE_GROUP_SIZE("node_group_size", 50,
"Maximum number of nodes can be used for operation at a time, zero or negative value means all."),
/**
* Whether to perform health check against all nodes or just faulty ones.
*/
CHECK_ALL_NODES("check_all_nodes", false,
"Whether to perform health check against all nodes or just faulty ones."),
/**
* Default buffer size in byte for both request and response. It will be reset
* to {@link #MAX_BUFFER_SIZE} if it's too large.
*/
BUFFER_SIZE("buffer_size", ClickHouseDataConfig.DEFAULT_BUFFER_SIZE,
"Default buffer size in byte for both request and response."),
/**
* Number of times the buffer queue is filled up before increasing capacity of
* buffer queue. Zero or negative value means the queue length is fixed.
*/
BUFFER_QUEUE_VARIATION("buffer_queue_variation", ClickHouseDataConfig.DEFAULT_BUFFER_QUEUE_VARIATION,
"Number of times the buffer queue is filled up before increasing capacity of buffer queue. Zero or negative value means the queue length is fixed."),
/**
* Read buffer size in byte. It's mainly for input stream(e.g. reading data from
* server response). Its value defaults to {@link #BUFFER_SIZE}, and it will be
* reset to {@link #MAX_BUFFER_SIZE} when it's too large.
*/
READ_BUFFER_SIZE("read_buffer_size", 0,
"Read buffer size in byte, zero or negative value means same as buffer_size"),
/**
* Write buffer size in byte. It's mainly for output stream(e.g. writing data
* into request). Its value defaults to {@link #BUFFER_SIZE}, and it will
* be reset to {@link #MAX_BUFFER_SIZE} when it's too large.
*/
WRITE_BUFFER_SIZE("write_buffer_size", 0,
"Write buffer size in byte, zero or negative value means same as buffer_size"),
/**
* Maximum request chunk size in byte.
*/
REQUEST_CHUNK_SIZE("request_chunk_size", 0,
"Maximum request chunk size in byte, zero or negative value means same as write_buffer_size"),
/**
* Request buffering mode.
*/
REQUEST_BUFFERING("request_buffering", ClickHouseDefaults.BUFFERING.getDefaultValue(),
"Request buffering mode"),
/**
* Response buffering mode.
*/
RESPONSE_BUFFERING("response_buffering", ClickHouseDefaults.BUFFERING.getDefaultValue(),
"Response buffering mode."),
/**
* Client name.
*/
CLIENT_NAME("client_name", "ClickHouse Java Client",
"Client name, which is either 'client_name' or 'http_user_agent' shows up in system.query_log table."),
/**
* Whether server will compress response to client or not.
*/
COMPRESS("compress", true, "Whether the server will compress response it sends to client."),
/**
* Whether server will decompress request from client or not.
*/
DECOMPRESS("decompress", false, "Whether the server will decompress request from client."),
/**
* Compression algorithm server will use to compress response, when
* {@link #COMPRESS} is {@code true}.
*/
COMPRESS_ALGORITHM("compress_algorithm", ClickHouseCompression.LZ4,
"Algorithm used for server to compress response."),
/**
* Compression algorithm server will use to decompress request, when
* {@link #DECOMPRESS} is {@code true}.
*/
DECOMPRESS_ALGORITHM("decompress_algorithm", ClickHouseCompression.LZ4,
"Algorithm for server to decompress request."),
/**
* Compression level for compressing server response.
*/
COMPRESS_LEVEL("compress_level", ClickHouseDataConfig.DEFAULT_READ_COMPRESS_LEVEL,
"Compression level for response, -1 standards for default"),
/**
* Compression level for decompress client request.
*/
DECOMPRESS_LEVEL("decompress_level", ClickHouseDataConfig.DEFAULT_WRITE_COMPRESS_LEVEL,
"Compression level for request, -1 standards for default"),
/**
* Connection timeout in milliseconds.
*/
CONNECTION_TIMEOUT("connect_timeout", 5000,
"Connection timeout in milliseconds. It's also used for waiting a connection being closed."),
/**
* Default database.
*/
DATABASE("database", "", "Default database."),
/**
* Maximum number of times failover can happen for a request.
*/
FAILOVER("failover", 0,
"Maximum number of times failover can happen for a request, zero or negative value means no failover."),
/**
* Default format.
*/
FORMAT("format", ClickHouseDataConfig.DEFAULT_FORMAT, "Default format."),
/**
* Whether to log leading comment(as log_comment in system.query_log) of the
* query.
*/
LOG_LEADING_COMMENT("log_leading_comment", false,
"Whether to log leading comment(as log_comment in system.query_log) of the query."),
/**
* Maximum buffer size in byte can be used for streaming. It's not supposed to
* be larger than {@code Integer.MAX_VALUE - 8}.
*/
MAX_BUFFER_SIZE("max_buffer_size", ClickHouseDataConfig.DEFAULT_MAX_BUFFER_SIZE,
"Maximum buffer size in byte can be used for streaming."),
/**
* Maximum number of mappers can be cached.
*/
MAX_MAPPER_CACHE("max_mapper_cache", ClickHouseDataConfig.DEFAULT_MAX_MAPPER_CACHE,
"Maximum number of mappers can be cached."),
/**
* Maximum query execution time in seconds.
*/
MAX_EXECUTION_TIME("max_execution_time", 0, "Maximum query execution time in seconds, 0 means no limit."),
/**
* Maximum queued in-memory buffers.
*/
MAX_QUEUED_BUFFERS("max_queued_buffers", ClickHouseDataConfig.DEFAULT_MAX_QUEUED_BUFFERS,
"Maximum queued in-memory buffers, 0 or negative number means no limit."),
/**
* Maxium queued requests. When {@link #MAX_THREADS_PER_CLIENT} is greater than
* zero, this will also be applied to client's thread pool as well.
*/
MAX_QUEUED_REQUESTS("max_queued_requests", 0, "Maximum queued requests, 0 or negative number means no limit."),
/**
* Maximum rows allowed in the result.
*/
MAX_RESULT_ROWS("max_result_rows", 0L,
"Limit on the number of rows in the result. "
+ "Also checked for subqueries, and on remote servers when running parts of a distributed query."),
/**
* Maximum size of thread pool for each client.
*/
MAX_THREADS_PER_CLIENT("max_threads_per_client", 0,
"Size of thread pool for each client instance, 0 or negative number means the client will use shared thread pool."),
/**
* Product name usered in user agent.
*/
PRODUCT_NAME("product_name", "ClickHouse-JavaClient", "Product name used in user agent."),
/**
* Method to rename response columns.
*/
RENAME_RESPONSE_COLUMN("rename_response_column", ClickHouseDataConfig.DEFAULT_COLUMN_RENAME_METHOD,
"Method to rename response columns."),
/**
* Maximum number of times retry can happen for a request.
*/
RETRY("retry", 0,
"Maximum number of times retry can happen for a request, zero or negative value means no retry."),
/**
* Whether to repeat execution when session is locked, until timed out(according
* to {@link #SESSION_TIMEOUT} or {@link #CONNECTION_TIMEOUT}).
*/
REPEAT_ON_SESSION_LOCK("repeat_on_session_lock", true,
"Whether to repeat execution when session is locked, until timed out(according to 'session_timeout' or 'connect_timeout')."),
/**
* Whether to reuse wrapper of value(e.g. ClickHouseValue or
* ClickHouseRecord) for memory efficiency.
*/
REUSE_VALUE_WRAPPER("reuse_value_wrapper", ClickHouseDataConfig.DEFAULT_REUSE_VALUE_WRAPPER,
"Whether to reuse wrapper of value(e.g. ClickHouseValue or ClickHouseRecord) for memory efficiency."),
/**
* Server revision.
*/
SERVER_REVISION("server_revision", 54442, "Server revision."),
/**
* Server timezone.
*/
SERVER_TIME_ZONE("server_time_zone", "", "Server timezone."),
/**
* Server version.
*/
SERVER_VERSION("server_version", "", "Server version."),
/**
* Session id.
*/
SESSION_ID("session_id", "", "Session id"),
/**
* Whether to check if session id is validate.
*/
SESSION_CHECK("session_check", false, "Whether to check if existence of session id."),
/**
* Session timeout in seconds.
*/
SESSION_TIMEOUT("session_timeout", 0,
"Session timeout in seconds. 0 or negative number means same as server default."),
/**
* Socket timeout in milliseconds.
*/
SOCKET_TIMEOUT("socket_timeout", ClickHouseDataConfig.DEFAULT_TIMEOUT, "Socket timeout in milliseconds."),
/**
* Whether allows for the reuse of local addresses and ports. See
* {@link java.net.StandardSocketOptions#SO_REUSEADDR}.
*/
SOCKET_REUSEADDR("socket_reuseaddr", false,
"Whether allows for the reuse of local addresses and ports. "
+ "Only works for client using custom Socket(e.g. TCP client or HTTP provider with custom SocketFactory etc.)."),
/**
* Whether to enable keep-alive packets for a socket connection. See
* {@link java.net.StandardSocketOptions#SO_KEEPALIVE}.
*/
SOCKET_KEEPALIVE("socket_keepalive", false,
"Whether to enable keep-alive packets for a socket connection. Only works for client using custom Socket."),
/**
* Seconds to wait while data is being transmitted before closing the socket.
* Use negative number to disable the option. See
* {@link java.net.StandardSocketOptions#SO_LINGER}.
*/
SOCKET_LINGER("socket_linger", -1,
"Seconds to wait while data is being transmitted before closing the socket. Use negative number to disable the option. "
+ "Only works for client using custom Socket(e.g. TCP client or HTTP provider with custom SocketFactory etc.)."),
/**
* Type-of-service(TOS) or traffic class field in the IP header for a socket.
* See {@link java.net.StandardSocketOptions#IP_TOS}.
*/
SOCKET_IP_TOS("socket_ip_tos", 0,
"Socket IP_TOS option which indicates IP package priority. Only works for client using custom Socket."),
/**
* See {@link java.net.StandardSocketOptions#TCP_NODELAY}.
*/
SOCKET_TCP_NODELAY("socket_tcp_nodelay", false, ""),
/**
* Size of the socket receive buffer in bytes. See
* {@link java.net.StandardSocketOptions#SO_RCVBUF}.
*/
SOCKET_RCVBUF("socket_rcvbuf", 0,
"Size of the socket receive buffer in bytes. Only works for client using custom Socket."),
/**
* Size of the socket send buffer in bytes. See
* {@link java.net.StandardSocketOptions#SO_SNDBUF}.
*/
SOCKET_SNDBUF("socket_sndbuf", 0,
"Size of the socket send buffer in bytes. Only works for client using custom Socket."),
// TODO: new and extended socket options(e.g SO_REUSEPORT and TCP_QUICKACK etc.)
/**
* Whether to enable SSL for the connection.
*/
SSL("ssl", false, "Whether to enable SSL/TLS for the connection."),
/**
* SSL mode.
*/
SSL_MODE("sslmode", ClickHouseSslMode.STRICT, "verify or not certificate: none (don't verify), strict (verify)"),
/**
* SSL root certificiate.
*/
SSL_ROOT_CERTIFICATE("sslrootcert", "", "SSL/TLS root certificates."),
/**
* SSL certificiate.
*/
SSL_CERTIFICATE("sslcert", "", "SSL/TLS certificate."),
/**
* SSL key.
*/
SSL_KEY("sslkey", "", "RSA key in PKCS#8 format.", true),
/**
* Key Store type.
*/
KEY_STORE_TYPE("key_store_type", "", "Specifies the type or format of the keystore/truststore file used for SSL/TLS configuration, such as \"JKS\" (Java KeyStore) or \"PKCS12.\"", true),
/**
* Trust Store.
*/
TRUST_STORE("trust_store", "", "Path to the truststore file", true),
/**
* Trust Store password.
*/
KEY_STORE_PASSWORD("key_store_password", "", "Password needed to access the keystore file specified in the keystore config", true),
/**
* Transaction timeout in seconds.
*/
TRANSACTION_TIMEOUT("transaction_timeout", 0,
"Transaction timeout in seconds. 0 or negative number means same as session_timeout."),
/**
* Whether to convert unsigned types to the next widest type(e.g. use
* {@code short} for UInt8 instead of {@code byte}, and {@code UnsignedLong} for
* UInt64).
*/
WIDEN_UNSIGNED_TYPES("widen_unsigned_types", ClickHouseDataConfig.DEFAULT_WIDEN_UNSIGNED_TYPE,
"Whether to convert unsigned types to the next widest type(e.g. use short for UInt8 instead of byte, and UnsignedLong for UInt64)."),
/**
* Whether to support binary string. Enable this option to treat
* {@code FixedString} and {@code String} as byte array.
*/
USE_BINARY_STRING("use_binary_string", ClickHouseDataConfig.DEFAULT_USE_BINARY_STRING,
"Whether to support binary string. Enable this option to treat FixedString and String as byte array."),
/**
* Whether to use blocking queue for buffering.
*/
USE_BLOCKING_QUEUE("use_blocking_queue", ClickHouseDataConfig.DEFAULT_USE_BLOCKING_QUEUE,
"Whether to use blocking queue for buffering."),
/**
* Whether to use compilation(generated byte code) in object mapping and
* serialization.
*/
USE_COMPILATION("use_compilation", ClickHouseDataConfig.DEFAULT_USE_COMPILATION,
"Whether to use compilation(generated byte code) in object mapping and serialization."),
/**
* Whether Object[] should be used instead of primitive arrays.
*/
USE_OBJECTS_IN_ARRAYS("use_objects_in_arrays", ClickHouseDataConfig.DEFAULT_USE_OBJECT_IN_ARRAY,
"Whether Object[] should be used instead of primitive arrays."),
/**
* Type of proxy can be used to access ClickHouse server. To use an HTTP/SOCKS
* proxy, you must specify the {@link #PROXY_HOST} and {@link #PROXY_PORT}.
*/
PROXY_TYPE("proxy_type", ClickHouseProxyType.IGNORE,
"Type of proxy can be used to access ClickHouse server. To use an HTTP/SOCKS proxy, you must specify proxy_host and proxy_port."),
/**
* Set Clickhouse proxy hostname.
*/
PROXY_HOST("proxy_host", "", "Set ClickHouse server proxy hostname."),
/**
* Set ClickHouse proxy port.
*/
PROXY_PORT("proxy_port", -1, "Set ClickHouse server proxy hostname."),
/**
* Whether to use server time zone.
*/
USE_SERVER_TIME_ZONE("use_server_time_zone", true,
"Whether to use server time zone. On connection init select timezone() will be executed"),
/**
* Whether to use time zone from server for Date.
*/
USE_SERVER_TIME_ZONE_FOR_DATES("use_server_time_zone_for_dates", false,
"Whether to use timezone from server on Date parsing in getDate(). "
+ "If false, Date returned is a wrapper of a timestamp at start of the day in client timezone. "
+ "If true - at start of the day in server or use_time_zone timezone."),
/**
* Custom time zone. Only works when {@code use_server_time_zone} is set to
* false.
*/
USE_TIME_ZONE("use_time_zone", "", "Time zone of all DateTime* values. "
+ "Only used when use_server_time_zone is false. Empty value means client time zone."),
/**
* Query ID to be attached to an operation
*/
QUERY_ID("query_id", "", "Query id"),
/**
* Connection time to live in milliseconds. 0 or negative number means no limit.
* Can be used to override keep-alive time suggested by a server.
*/
CONNECTION_TTL("connection_ttl", 0L,
"Connection time to live in milliseconds. 0 or negative number means no limit."),
;
private final String key;
private final Serializable defaultValue;
private final Class clazz;
private final String description;
private final boolean sensitive;
private static final Map options;
static final String UNKNOWN = "unknown";
public static final String LATEST_KNOWN_VERSION = "0.6.3";
/**
* Semantic version of the product.
*/
public static final String PRODUCT_VERSION;
/**
* Revision(shortened git commit hash) of the product.
*/
public static final String PRODUCT_REVISION;
/**
* Client O/S information in format of {@code /}.
*/
public static final String CLIENT_OS_INFO;
/**
* Client JVM information in format of {@code /}.
*/
public static final String CLIENT_JVM_INFO;
/**
* Client user name.
*/
public static final String CLIENT_USER;
/**
* Client host name.
*/
public static final String CLIENT_HOST;
static {
Map map = new HashMap<>();
for (ClickHouseClientOption o : values()) {
if (map.put(o.getKey(), o) != null) {
throw new IllegalStateException("Duplicated key found: " + o.getKey());
}
}
options = Collections.unmodifiableMap(map);
// (revision: )
String ver = ClickHouseClientOption.class.getPackage().getImplementationVersion();
String[] parts = ver == null || ver.isEmpty() ? null : ver.split("\\s");
if (parts != null && parts.length == 4 && parts[1].length() > 0 && parts[3].length() > 1
&& ver.charAt(ver.length() - 1) == ')') {
PRODUCT_VERSION = parts[1];
ver = parts[3];
PRODUCT_REVISION = ver.substring(0, ver.length() - 1);
} else { // perhaps try harder by checking version from pom.xml?
PRODUCT_VERSION = LATEST_KNOWN_VERSION;
PRODUCT_REVISION = UNKNOWN;
}
CLIENT_OS_INFO = new StringBuilder().append(getSystemConfig("os.name", "O/S")).append('/')
.append(getSystemConfig("os.version", UNKNOWN)).toString();
String javaVersion = System.getProperty("java.vendor.version");
if (javaVersion == null || javaVersion.isEmpty() || javaVersion.indexOf(' ') >= 0) {
javaVersion = getSystemConfig("java.vm.version", getSystemConfig("java.version", UNKNOWN));
}
CLIENT_JVM_INFO = new StringBuilder().append(getSystemConfig("java.vm.name", "Java")).append('/')
.append(javaVersion).toString();
CLIENT_USER = getSystemConfig("user.name", UNKNOWN);
try {
ver = InetAddress.getLocalHost().getHostName();
} catch (UnknownHostException e1) {
// ignore
}
CLIENT_HOST = ver == null || ver.isEmpty() ? UNKNOWN : ver;
}
/**
* Builds user-agent based on given product name. The user-agent will be
* something look like
* {@code / (/; /[; ]; rv:)}.
*
* @param productName product name, null or blank string is treated as
* {@code ClickHouse Java Client}
* @param additionalProperty additional property if any
* @return non-empty user-agent
*/
public static String buildUserAgent(String productName, String additionalProperty) {
productName = productName == null || productName.isEmpty() ? (String) PRODUCT_NAME.getEffectiveDefaultValue() : productName.trim();
StringBuilder builder = new StringBuilder(productName).append(PRODUCT_VERSION.isEmpty() ? "" : "/" + PRODUCT_VERSION);
if (!String.valueOf(PRODUCT_NAME.getDefaultValue()).equals(productName)) {//Append if someone changed the original value
builder.append(" ").append(PRODUCT_NAME.getDefaultValue()).append(LATEST_KNOWN_VERSION);
}
builder.append(" (").append(CLIENT_JVM_INFO);
if (additionalProperty != null && !additionalProperty.isEmpty()) {
builder.append("; ").append(additionalProperty.trim());
}
return builder.append(")").toString();
}
/**
* Gets system property and fall back to the given value as needed.
*
* @param propertyName non-null property name
* @param defaultValue default value, only useful if it's not null
* @return property value
*/
public static String getSystemConfig(String propertyName, String defaultValue) {
final String propertyValue = System.getProperty(propertyName);
if (defaultValue == null) {
return propertyValue;
}
return propertyValue == null || propertyValue.isEmpty() ? defaultValue : propertyValue;
}
/**
* Gets client option by key.
*
* @param key key of the option
* @return client option object, or null if not found
*/
public static ClickHouseClientOption fromKey(String key) {
return options.get(key);
}
/**
* Constructor of an option for client.
*
* @param type of the value, usually either String or Number(e.g.
* int, long etc.)
* @param key non-null key, better use snake_case instead of camelCase
* for consistency
* @param defaultValue non-null default value
* @param description non-null description of this option
*/
ClickHouseClientOption(String key, T defaultValue, String description) {
this(key, defaultValue, description, false);
}
/**
* Constructor of client option.
*
* @param type of the value, usually either String or Number(e.g.
* int, long etc.)
* @param key non-null key, better use snake_case instead of camelCase
* for consistency
* @param defaultValue non-null default value
* @param description non-null description of this option
* @param sensitive whether the option is sensitive or not
*/
ClickHouseClientOption(String key, T defaultValue, String description, boolean sensitive) {
this.key = ClickHouseChecker.nonNull(key, "key");
this.defaultValue = ClickHouseChecker.nonNull(defaultValue, "defaultValue");
this.clazz = defaultValue.getClass();
this.description = ClickHouseChecker.nonNull(description, "description");
this.sensitive = sensitive;
}
@Override
public Serializable getDefaultValue() {
return defaultValue;
}
@Override
public String getDescription() {
return description;
}
@Override
public String getKey() {
return key;
}
@Override
public Class getValueType() {
return clazz;
}
@Override
public boolean isSensitive() {
return sensitive;
}
}