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Unified Java client for ClickHouse
package com.clickhouse.client;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.TimeZone;
import java.util.WeakHashMap;
import java.util.Map.Entry;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Function;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import com.clickhouse.client.config.ClickHouseClientOption;
import com.clickhouse.client.config.ClickHouseDefaults;
import com.clickhouse.client.config.ClickHouseSslMode;
import com.clickhouse.config.ClickHouseOption;
import com.clickhouse.data.ClickHouseChecker;
import com.clickhouse.data.ClickHouseUtils;
import com.clickhouse.data.ClickHouseVersion;
import com.clickhouse.logging.Logger;
import com.clickhouse.logging.LoggerFactory;
/**
* This class depicts a ClickHouse server, essentially a combination of host,
* port and protocol, for client to connect.
*/
public class ClickHouseNode implements Function, Serializable {
/**
* Node status.
*/
public enum Status {
/**
* Healthy status.
*/
HEALTHY,
/**
* Managed status.
*/
MANAGED,
/**
* Faulty status.
*/
FAULTY,
/**
* Standalone status.
*/
STANDALONE;
}
/**
* Mutable and non-thread safe builder.
*/
public static class Builder {
protected String host;
protected ClickHouseProtocol protocol;
protected Integer port;
protected ClickHouseCredentials credentials;
protected final Map options;
// label is more expressive, but is slow for comparison
protected final Set tags;
/**
* Default constructor.
*/
protected Builder() {
this.host = null;
this.protocol = null;
this.port = null;
this.credentials = null;
this.options = new LinkedHashMap<>();
this.tags = new LinkedHashSet<>();
}
protected String getHost() {
if (ClickHouseChecker.isNullOrEmpty(host)) {
host = (String) ClickHouseDefaults.HOST.getEffectiveDefaultValue();
}
return host;
}
protected ClickHouseProtocol getProtocol() {
if (protocol == null) {
protocol = (ClickHouseProtocol) ClickHouseDefaults.PROTOCOL.getEffectiveDefaultValue();
}
return protocol;
}
protected int getPort() {
if (port == null) {
port = getProtocol().getDefaultPort();
}
return port;
}
protected ClickHouseCredentials getCredentials() {
return credentials;
}
protected Map getOptions() {
return options;
}
protected Set getTags() {
return tags;
}
/**
* Sets cluster name.
*
* @param cluster cluster name, null means no cluster name
* @return this builder
*/
public Builder cluster(String cluster) {
if (!ClickHouseChecker.isNullOrEmpty(cluster)) {
options.put(PARAM_CLUSTER, cluster);
} else {
options.remove(PARAM_CLUSTER);
}
return this;
}
/**
* Sets host name.
*
* @param host host name, null means {@link ClickHouseDefaults#HOST}
* @return this builder
*/
public Builder host(String host) {
this.host = host;
return this;
}
/**
* Sets port number.
*
* @param port port number, null means default port of
* {@link ClickHouseDefaults#PROTOCOL}
* @return this builder
*/
public Builder port(Integer port) {
return port(null, port);
}
/**
* Sets protocol used by the port.
*
* @param protocol protocol, null means {@link ClickHouseDefaults#PROTOCOL}
* @return this builder
*/
public Builder port(ClickHouseProtocol protocol) {
return port(protocol, null);
}
/**
* Sets protocol and port number.
*
* @param protocol protocol, null means {@link ClickHouseDefaults#PROTOCOL}
* @param port number, null means default port of {@code protocol}
* @return this builder
*/
public Builder port(ClickHouseProtocol protocol, Integer port) {
this.protocol = protocol;
this.port = port;
return this;
}
/**
* Sets socket address.
*
* @param address socket address, null means {@link ClickHouseDefaults#HOST} and
* default port of {@link ClickHouseDefaults#PROTOCOL}
* @return this builder
*/
public Builder address(InetSocketAddress address) {
return address(null, address);
}
/**
* Sets protocol and socket address.
*
* @param protocol protocol, null means {@link ClickHouseDefaults#PROTOCOL}
* @param address socket address, null means {@link ClickHouseDefaults#HOST}
* and default port of {@code protocol}
* @return this builder
*/
public Builder address(ClickHouseProtocol protocol, InetSocketAddress address) {
if (address != null) {
host(address.getHostName());
port(protocol, address.getPort());
} else {
host(null);
port(protocol, null);
}
return this;
}
/**
* Sets database name.
*
* @param database database name, null means {@link ClickHouseDefaults#DATABASE}
* @return this builder
*/
public Builder database(String database) {
if (!ClickHouseChecker.isNullOrEmpty(database)) {
options.put(ClickHouseClientOption.DATABASE.getKey(), database);
} else {
options.remove(ClickHouseClientOption.DATABASE.getKey());
}
return this;
}
/**
* Sets credentials will be used when connecting to this node. This is optional
* as client will use {@link ClickHouseConfig#getDefaultCredentials()} to
* connect to all nodes.
*
* @param credentials credentials, null means
* {@link ClickHouseConfig#getDefaultCredentials()}
* @return this builder
*/
public Builder credentials(ClickHouseCredentials credentials) {
this.credentials = credentials;
return this;
}
/**
* Adds an option for this node.
*
* @param option option name, null value will be ignored
* @param value option value
* @return this builder
*/
public Builder addOption(String option, String value) {
if (option != null) {
if (value != null) {
options.put(option, value);
} else {
options.remove(option);
}
}
return this;
}
/**
* Removes an option from this node.
*
* @param option option to be removed, null value will be ignored
* @return this builder
*/
public Builder removeOption(String option) {
if (!ClickHouseChecker.isNullOrEmpty(option)) {
options.remove(option);
}
return this;
}
/**
* Sets all options for this node. Use null or empty value to clear all existing
* options.
*
* @param options options for the node
* @return this builder
*/
public Builder options(Map options) {
this.options.clear();
if (options != null) {
this.options.putAll(options);
}
return this;
}
/**
* Adds a tag for this node.
*
* @param tag tag for the node, null or duplicate tag will be ignored
* @return this builder
*/
public Builder addTag(String tag) {
if (!ClickHouseChecker.isNullOrEmpty(tag)) {
tags.add(tag);
}
return this;
}
/**
* Removes a tag from this node.
*
* @param tag tag to be removed, null value will be ignored
* @return this builder
*/
public Builder removeTag(String tag) {
if (!ClickHouseChecker.isNullOrEmpty(tag)) {
tags.remove(tag);
}
return this;
}
/**
* Sets all tags for this node. Use null or empty value to clear all existing
* tags.
*
* @param tag tag for the node, null will be ignored
* @param more more tags for the node, null tag will be ignored
* @return this builder
*/
public Builder tags(String tag, String... more) {
this.tags.clear();
addTag(tag);
if (more != null) {
for (String t : more) {
addTag(t);
}
}
return this;
}
/**
* Sets all tags for this node. Use null or empty value to clear all existing
* tags.
*
* @param tags list of tags for the node, null tag will be ignored
* @return this builder
*/
public Builder tags(Collection tags) {
this.tags.clear();
if (tags != null) {
for (String t : tags) {
addTag(t);
}
}
return this;
}
public Builder replica(Integer num) {
if (num != null) {
options.put(PARAM_REPLICA_NUM, num.toString());
} else {
options.remove(PARAM_REPLICA_NUM);
}
return this;
}
public Builder shard(Integer num, Integer weight) {
if (num != null) {
options.put(PARAM_SHARD_NUM, num.toString());
} else {
options.remove(PARAM_SHARD_NUM);
}
if (weight != null) {
options.put(PARAM_SHARD_WEIGHT, weight.toString());
} else {
options.remove(PARAM_SHARD_WEIGHT);
}
return this;
}
/**
* Sets weight of this node.
*
* @param weight weight of the node, null means default weight
* @return this builder
*/
public Builder weight(Integer weight) {
if (weight != null) {
options.put(PARAM_WEIGHT, weight.toString());
} else {
options.remove(PARAM_WEIGHT);
}
return this;
}
/**
* Sets time zone of this node.
*
* @param tz time zone ID, could be null
* @return this builder
*/
public Builder timeZone(String tz) {
if (!ClickHouseChecker.isNullOrEmpty(tz)) {
options.put(ClickHouseClientOption.SERVER_TIME_ZONE.getKey(), tz);
} else {
options.remove(ClickHouseClientOption.SERVER_TIME_ZONE.getKey());
}
return this;
}
/**
* Sets time zone of this node.
*
* @param tz time zone, could be null
* @return this builder
*/
public Builder timeZone(TimeZone tz) {
timeZone(tz != null ? tz.getID() : null);
return this;
}
/**
* Sets vesion of this node.
*
* @param version version string, could be null
* @return this builder
*/
public Builder version(String version) {
if (!ClickHouseChecker.isNullOrEmpty(version)) {
options.put(ClickHouseClientOption.SERVER_VERSION.getKey(), version);
} else {
options.remove(ClickHouseClientOption.SERVER_VERSION.getKey());
}
return this;
}
/**
* Sets vesion of this node.
*
* @param version version, could be null
* @return this builder
*/
public Builder version(ClickHouseVersion version) {
version(version != null ? version.toString() : null);
return this;
}
/**
* Creates a new node.
*
* @return new node
*/
public ClickHouseNode build() {
return new ClickHouseNode(this);
}
}
private static final Logger log = LoggerFactory.getLogger(ClickHouseNode.class);
private static final long serialVersionUID = 8342604784121795372L;
private static final Map cache = Collections.synchronizedMap(new WeakHashMap<>());
static final ClickHouseNode DEFAULT = new ClickHouseNode("localhost", ClickHouseProtocol.ANY, 0, null, null, null);
static final int MAX_PORT_NUM = 65535;
static final int MIN_PORT_NUM = 0;
static final String PARAM_CLUSTER = "cluster";
static final String PARAM_SHARD_NUM = "shard_num";
static final String PARAM_SHARD_WEIGHT = "shard_weight";
static final String PARAM_REPLICA_NUM = "replica_num";
static final String PARAM_WEIGHT = "weight";
static final int DEFAULT_SHARD_NUM = 0;
static final int DEFAULT_SHARD_WEIGHT = 0;
static final int DEFAULT_REPLICA_NUM = 0;
static final int DEFAULT_WEIGHT = 1;
public static final String SCHEME_DELIMITER = "://";
static int extract(String scheme, int port, ClickHouseProtocol protocol, Map params) {
if (port < MIN_PORT_NUM || port > MAX_PORT_NUM) {
port = MIN_PORT_NUM;
}
if (protocol != ClickHouseProtocol.POSTGRESQL && scheme.charAt(scheme.length() - 1) == 's') {
params.putIfAbsent(ClickHouseClientOption.SSL.getKey(), Boolean.TRUE.toString());
params.putIfAbsent(ClickHouseClientOption.SSL_MODE.getKey(), ClickHouseSslMode.STRICT.name());
}
if (protocol != ClickHouseProtocol.ANY && port == MIN_PORT_NUM) {
if (Boolean.TRUE.toString().equals(params.get(ClickHouseClientOption.SSL.getKey()))) {
port = protocol.getDefaultSecurePort();
} else {
port = protocol.getDefaultPort();
}
}
return port;
}
static ClickHouseCredentials extract(String rawUserInfo, Map params,
ClickHouseCredentials defaultCredentials) {
ClickHouseCredentials credentials = defaultCredentials;
String user = "";
String passwd = "";
if (credentials != null && !credentials.useAccessToken()) {
user = credentials.getUserName();
passwd = credentials.getPassword();
}
if (!ClickHouseChecker.isNullOrEmpty(rawUserInfo)) {
int index = rawUserInfo.indexOf(':');
if (index < 0) {
user = ClickHouseUtils.decode(rawUserInfo);
} else {
String str = ClickHouseUtils.decode(rawUserInfo.substring(0, index));
if (!ClickHouseChecker.isNullOrEmpty(str)) {
user = str;
}
passwd = ClickHouseUtils.decode(rawUserInfo.substring(index + 1));
}
}
String str = params.remove(ClickHouseDefaults.USER.getKey());
if (!ClickHouseChecker.isNullOrEmpty(str)) {
user = str;
}
str = params.remove(ClickHouseDefaults.PASSWORD.getKey());
if (str != null) {
passwd = str;
}
if (!ClickHouseChecker.isNullOrEmpty(user)) {
credentials = ClickHouseCredentials.fromUserAndPassword(user, passwd);
} else if (!ClickHouseChecker.isNullOrEmpty(passwd)) {
credentials = ClickHouseCredentials
.fromUserAndPassword((String) ClickHouseDefaults.USER.getEffectiveDefaultValue(), passwd);
}
return credentials;
}
static URI normalize(String uri, ClickHouseProtocol defaultProtocol) {
int index = ClickHouseChecker.nonEmpty(uri, "URI").indexOf(SCHEME_DELIMITER);
String normalized;
if (index < 0) {
normalized = new StringBuilder()
.append((defaultProtocol != null ? defaultProtocol : ClickHouseProtocol.ANY).name()
.toLowerCase(Locale.ROOT))
.append(SCHEME_DELIMITER)
.append(uri.trim()).toString();
} else {
normalized = uri.trim();
}
return cache.computeIfAbsent(normalized, k -> {
try {
return new URI(k);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Invalid URI", e);
}
});
}
static void parseDatabase(String path, Map params) {
if (!ClickHouseChecker.isNullOrEmpty(path) && path.length() > 1) {
params.put(ClickHouseClientOption.DATABASE.getKey(), path.substring(1));
}
}
static void parseTags(String fragment, Set tags) {
if (ClickHouseChecker.isNullOrEmpty(fragment)) {
return;
}
for (int i = 0, len = fragment.length(); i < len; i++) {
int index = fragment.indexOf(',', i);
if (index == i) {
continue;
}
String tag;
if (index < 0) {
tag = fragment.substring(i).trim();
i = len;
} else {
tag = fragment.substring(i, index).trim();
i = index;
}
if (!tag.isEmpty()) {
tags.add(tag);
}
}
}
static ClickHouseNode probe(String host, int port, ClickHouseSslMode mode, String rootCaFile, String certFile,
String keyFile, int timeout) {
if (mode == null) {
return probe(host, port, timeout);
}
Map options = new HashMap<>();
options.put(ClickHouseClientOption.SSL, true);
options.put(ClickHouseClientOption.SSL_MODE, mode);
options.put(ClickHouseClientOption.SSL_ROOT_CERTIFICATE, rootCaFile);
options.put(ClickHouseClientOption.SSL_CERTIFICATE, certFile);
options.put(ClickHouseClientOption.SSL_KEY, keyFile);
ClickHouseConfig config = new ClickHouseConfig(options);
SSLContext sslContext = null;
try {
sslContext = ClickHouseSslContextProvider.getProvider().getSslContext(SSLContext.class, config)
.orElse(null);
} catch (SSLException e) {
log.debug("Failed to create SSL context due to: %s", e.getMessage());
}
if (sslContext == null) {
return probe(host, port, timeout);
}
SSLSocketFactory factory = sslContext.getSocketFactory();
ClickHouseDnsResolver resolver = ClickHouseDnsResolver.getInstance();
ClickHouseProtocol p = ClickHouseProtocol.HTTP;
InetSocketAddress address = resolver != null
? resolver.resolve(ClickHouseProtocol.ANY, host, port)
: new InetSocketAddress(host, port);
try (SSLSocket client = (SSLSocket) factory.createSocket()) {
client.setKeepAlive(false);
client.setSoTimeout(timeout);
client.connect(address, timeout);
client.startHandshake();
try (OutputStream out = client.getOutputStream(); InputStream in = client.getInputStream()) {
out.write("GET /ping HTTP/1.1\r\n\r\n".getBytes(StandardCharsets.US_ASCII));
out.flush();
byte[] buf = new byte[12]; // HTTP/1.x xxx
int read = in.read(buf);
if (read == -1) {
p = ClickHouseProtocol.GRPC;
} else if (buf[0] == 72 && buf[9] == 52) {
p = ClickHouseProtocol.TCP;
}
}
} catch (IOException e) {
// MYSQL does not support SSL
// and PostgreSQL will end up with SocketTimeoutException
log.debug("Failed to probe %s:%d", host, port, e);
}
return new ClickHouseNode(host, p, port, null, null, null);
}
static ClickHouseNode probe(String host, int port, int timeout) {
ClickHouseDnsResolver resolver = ClickHouseDnsResolver.getInstance();
InetSocketAddress address = resolver != null
? resolver.resolve(ClickHouseProtocol.ANY, host, port)
: new InetSocketAddress(host, port);
ClickHouseProtocol p = ClickHouseProtocol.HTTP;
// TODO needs a better way so that we can detect PostgreSQL port as well
try (Socket client = new Socket()) {
client.setKeepAlive(false);
client.connect(address, timeout);
client.setSoTimeout(timeout);
try (OutputStream out = client.getOutputStream(); InputStream in = client.getInputStream()) {
out.write("GET /ping HTTP/1.1\r\n\r\n".getBytes(StandardCharsets.US_ASCII));
out.flush();
byte[] buf = new byte[12]; // HTTP/1.x xxx
int read = in.read(buf);
if (read == buf.length && buf[0] == 0) {
p = ClickHouseProtocol.GRPC;
} else if (buf[0] != 0 && buf[3] == 0) {
p = ClickHouseProtocol.MYSQL;
} else if (buf[0] == 72 && buf[9] == 52) {
p = ClickHouseProtocol.TCP;
}
}
} catch (IOException e) {
// PostgreSQL will end up with SocketTimeoutException
log.debug("Failed to probe %s:%d", host, port, e);
}
return new ClickHouseNode(host, p, port, null, null, null);
}
static String value(String value, String defaultValue) {
return ClickHouseChecker.isNullOrEmpty(value) ? defaultValue : value;
}
static int value(String value, int defaultValue) {
return ClickHouseChecker.isNullOrEmpty(value) ? defaultValue : Integer.parseInt(value);
}
/**
* Gets builder for creating a new node, same as {@code builder(null)}.
*
* @return builder for creating a new node
*/
public static Builder builder() {
return builder(null);
}
/**
* Gets builder for creating a new node based on the given one.
*
* @param base template to start with
* @return builder for creating a new node
*/
public static Builder builder(ClickHouseNode base) {
Builder b = new Builder();
if (base != null) {
Map map = new LinkedHashMap<>(base.options);
map.put(PARAM_CLUSTER, base.getCluster());
map.put(PARAM_REPLICA_NUM, Integer.toString(base.replicaNum));
map.put(PARAM_SHARD_NUM, Integer.toString(base.shardNum));
map.put(PARAM_SHARD_WEIGHT, Integer.toString(base.shardWeight));
map.put(PARAM_WEIGHT, Integer.toString(base.getWeight()));
b.host(base.getHost()).port(base.getProtocol(), base.getPort()).credentials(base.credentials).options(map)
.tags(base.getTags());
}
return b;
}
/**
* Creates a node object in one go. Short version of
* {@code ClickHouseNode.builder().host(host).port(protocol, port).database(database).tags(tags).build()}.
*
* @param host host name, null means {@link ClickHouseDefaults#HOST}
* @param protocol protocol, null means {@link ClickHouseDefaults#PROTOCOL}
* @param port port number
* @param database database name, null means {@link ClickHouseDefaults#DATABASE}
* @param tags tags for the node, null tag will be ignored
* @return non-null node object
*/
public static ClickHouseNode of(String host, ClickHouseProtocol protocol, int port, String database,
String... tags) {
Builder builder = builder().host(host).port(protocol, port).database(database);
if (tags != null && tags.length > 0) {
builder.tags(null, tags);
}
return builder.build();
}
/**
* Creates a node object using given URI. Same as
* {@code of(uri, ClickHouseProtocol.ANY)}.
*
* @param uri non-empty URI
* @return non-null node object
*/
public static ClickHouseNode of(String uri) {
return of(uri, DEFAULT);
}
/**
* Creates a node object using given URI. Same as
* {@code of(uri, ClickHouseProtocol.ANY)}.
*
* @param uri non-empty URI
* @param options default options
* @return non-null node object
*/
public static ClickHouseNode of(String uri, Map options) {
URI normalizedUri = normalize(uri, null);
Map params = new LinkedHashMap<>();
parseDatabase(normalizedUri.getPath(), params);
ClickHouseUtils.extractParameters(normalizedUri.getRawQuery(), params);
Set tags = new LinkedHashSet<>();
parseTags(normalizedUri.getRawFragment(), tags);
if (options != null && !options.isEmpty()) {
for (Entry entry : options.entrySet()) {
if (entry.getKey() != null) {
if (entry.getValue() != null) {
params.put(entry.getKey().toString(), entry.getValue().toString());
} else {
params.remove(entry.getKey().toString());
}
}
}
}
String scheme = normalizedUri.getScheme();
ClickHouseProtocol protocol = ClickHouseProtocol.fromUriScheme(scheme);
int port = extract(scheme, normalizedUri.getPort(), protocol, params);
ClickHouseCredentials credentials = extract(normalizedUri.getRawUserInfo(), params, null);
return new ClickHouseNode(normalizedUri.getHost(), protocol, port, credentials, params, tags);
}
/**
* Creates a node object using given URI and template.
*
* @param uri non-empty URI
* @param template optinal template used for creating the node
* @return non-null node object
*/
public static ClickHouseNode of(String uri, ClickHouseNode template) {
return of(normalize(uri, template != null ? template.getProtocol() : null), template);
}
/**
* Creates a node object using given URI.
*
* @param uri non-null URI which contains scheme(protocol), host and
* optionally port
* @param template optinal template used for creating the node object
* @return non-null node object
*/
public static ClickHouseNode of(URI uri, ClickHouseNode template) {
String host = ClickHouseChecker.nonNull(uri, "URI").getHost();
String scheme = ClickHouseChecker.nonEmpty(uri.getScheme(), "Protocol");
if (template == null) {
template = DEFAULT;
}
if (ClickHouseChecker.isNullOrEmpty(host)) {
host = template.getHost();
}
Map params = new LinkedHashMap<>(template.options);
parseDatabase(uri.getPath(), params);
ClickHouseUtils.extractParameters(uri.getRawQuery(), params);
ClickHouseProtocol protocol = ClickHouseProtocol.fromUriScheme(scheme);
int port = extract(scheme, uri.getPort(), protocol, params);
ClickHouseCredentials credentials = extract(uri.getRawUserInfo(), params, template.credentials);
Set tags = new LinkedHashSet<>(template.tags);
parseTags(uri.getRawFragment(), tags);
// TODO allow to define scope of client option
for (String key : new String[] {
ClickHouseClientOption.LOAD_BALANCING_POLICY.getKey(),
ClickHouseClientOption.LOAD_BALANCING_TAGS.getKey(),
ClickHouseClientOption.FAILOVER.getKey(),
ClickHouseClientOption.NODE_DISCOVERY_INTERVAL.getKey(),
ClickHouseClientOption.NODE_DISCOVERY_LIMIT.getKey(),
ClickHouseClientOption.HEALTH_CHECK_INTERVAL.getKey(),
ClickHouseClientOption.NODE_GROUP_SIZE.getKey(),
ClickHouseClientOption.CHECK_ALL_NODES.getKey()
}) {
if (template.options.containsKey(key)) {
params.remove(key);
}
}
return new ClickHouseNode(host, protocol, port, credentials, params, tags);
}
private final String host;
private final ClickHouseProtocol protocol;
private final int port;
private final ClickHouseCredentials credentials;
private final Map options;
private final Set tags;
// cluster-specific properties
private final String cluster;
private final int replicaNum;
private final int shardNum;
private final int shardWeight;
private final int weight;
// cache
private final String baseUri;
/**
* Last update time in milliseconds.
*/
protected final AtomicLong lastUpdateTime;
// TODO: metrics
// consolidated copy of credentials, options and tags
protected final ClickHouseConfig config;
protected final AtomicReference manager;
protected ClickHouseNode(Builder builder) {
this(ClickHouseChecker.nonNull(builder, "builder").getHost(), builder.getProtocol(), builder.getPort(),
builder.getCredentials(), builder.getOptions(), builder.getTags());
}
protected ClickHouseNode(String host, ClickHouseProtocol protocol, int port, ClickHouseCredentials credentials,
Map options, Set tags) {
this.host = ClickHouseChecker.nonEmpty(host, "Host");
this.protocol = protocol != null ? protocol : ClickHouseProtocol.ANY;
this.port = port < MIN_PORT_NUM || port > MAX_PORT_NUM ? this.protocol.getDefaultPort() : port;
this.credentials = credentials;
if (options != null && !options.isEmpty()) {
Map map = new LinkedHashMap<>(options);
this.cluster = value(map.remove(PARAM_CLUSTER), "");
this.replicaNum = value(map.remove(PARAM_REPLICA_NUM), DEFAULT_REPLICA_NUM);
this.shardNum = value(map.remove(PARAM_SHARD_NUM), DEFAULT_SHARD_NUM);
this.shardWeight = value(map.remove(PARAM_SHARD_WEIGHT), DEFAULT_SHARD_WEIGHT);
this.weight = value(map.remove(PARAM_WEIGHT), DEFAULT_WEIGHT);
this.options = map.isEmpty() ? Collections.emptyMap() : Collections.unmodifiableMap(map);
} else {
this.cluster = "";
this.replicaNum = DEFAULT_REPLICA_NUM;
this.shardNum = DEFAULT_SHARD_NUM;
this.shardWeight = DEFAULT_SHARD_WEIGHT;
this.weight = DEFAULT_WEIGHT;
this.options = Collections.emptyMap();
}
this.lastUpdateTime = new AtomicLong(0L);
this.tags = tags == null || tags.isEmpty() ? Collections.emptySet()
: Collections.unmodifiableSet(new LinkedHashSet<>(tags));
this.config = new ClickHouseConfig(ClickHouseConfig.toClientOptions(options), credentials, null, null);
this.manager = new AtomicReference<>(null);
StringBuilder builder = new StringBuilder().append(this.protocol.name().toLowerCase(Locale.ROOT));
if (config.isSsl()) {
builder.append('s');
}
builder.append(SCHEME_DELIMITER);
builder.append(host).append(':').append(port).append('/');
this.baseUri = builder.toString();
}
protected ClickHouseNode probe() {
if (protocol != ClickHouseProtocol.ANY) {
return this;
}
ClickHouseNode newNode;
if (config.isSsl()) {
newNode = probe(host, port, config.getSslMode(), config.getSslRootCert(), config.getSslCert(),
config.getSslKey(), config.getConnectionTimeout());
} else {
newNode = probe(host, port, config.getConnectionTimeout());
}
return newNode;
}
/**
* Sets manager for this node.
*
* @param m node manager
* @return this node
*/
protected ClickHouseNode setManager(ClickHouseNodeManager m) {
this.manager.getAndUpdate(v -> {
boolean sameManager = Objects.equals(v, m);
if (v != null && !sameManager) {
v.update(ClickHouseNode.this, Status.STANDALONE);
}
return sameManager ? v : null;
});
if (m != null && manager.compareAndSet(null, m)) {
m.update(ClickHouseNode.this, Status.MANAGED);
}
return this;
}
/**
* Gets socket address to connect to this node.
*
* @return socket address to connect to the node
*/
public InetSocketAddress getAddress() {
return new InetSocketAddress(host, port);
}
/**
* Gets base URI which is composed of protocol, host and port.
*
* @return non-emtpy base URI
*/
public String getBaseUri() {
return this.baseUri;
}
/**
* Gets configuration.
*
* @return non-null configuration
*/
public ClickHouseConfig getConfig() {
return this.config;
}
/**
* Gets credentials for accessing this node. Use
* {@link ClickHouseConfig#getDefaultCredentials()} if this is not present.
*
* @return credentials for accessing this node
*/
public Optional getCredentials() {
return Optional.ofNullable(credentials);
}
/**
* Gets credentials for accessing this node. It first attempts to use
* credentials tied to the node, and then use default credentials from the given
* configuration.
*
* @param config non-null configuration for retrieving default credentials
* @return credentials for accessing this node
*/
public ClickHouseCredentials getCredentials(ClickHouseConfig config) {
return credentials != null ? credentials
: ClickHouseChecker.nonNull(config, ClickHouseConfig.TYPE_NAME).getDefaultCredentials();
}
/**
* Gets host of the node.
*
* @return host of the node
*/
public String getHost() {
return host;
}
/**
* Gets port of the node.
*
* @return port of the node
*/
public int getPort() {
return port;
}
/**
* Gets database of the node.
*
* @return database of the node
*/
public Optional getDatabase() {
return hasPreferredDatabase() ? Optional.of(this.config.getDatabase()) : Optional.empty();
}
/**
* Gets database of the node. When {@link #hasPreferredDatabase()} is
* {@code false}, it will use database from the given configuration.
*
* @param config non-null configuration to get default database
* @return database of the node
*/
public String getDatabase(ClickHouseConfig config) {
return !ClickHouseChecker.nonNull(config, ClickHouseConfig.TYPE_NAME).hasOption(ClickHouseClientOption.DATABASE)
&& hasPreferredDatabase() ? this.config.getDatabase() : config.getDatabase();
}
/**
* Gets all options of the node.
*
* @return options of the node
*/
public Map getOptions() {
return this.options;
}
/**
* Gets all tags of the node.
*
* @return tags of the node
*/
public Set getTags() {
return this.tags;
}
/**
* Gets weight of the node.
*
* @return weight of the node
*/
public int getWeight() {
return weight;
}
/**
* Gets time zone of the node.
*
* @return time zone of the node
*/
public Optional getTimeZone() {
return this.config.hasOption(ClickHouseClientOption.SERVER_TIME_ZONE)
? Optional.of(this.config.getServerTimeZone())
: Optional.empty();
}
/**
* Gets time zone of the node. When not defined, it will use server time zone
* from the given configuration.
*
* @param config non-null configuration to get server time zone
* @return time zone of the node
*/
public TimeZone getTimeZone(ClickHouseConfig config) {
return this.config.hasOption(ClickHouseClientOption.SERVER_TIME_ZONE) ? this.config.getServerTimeZone()
: ClickHouseChecker.nonNull(config, ClickHouseConfig.TYPE_NAME).getServerTimeZone();
}
/**
* Gets version of the node.
*
* @return version of the node
*/
public Optional getVersion() {
return this.config.hasOption(ClickHouseClientOption.SERVER_VERSION)
? Optional.of(this.config.getServerVersion())
: Optional.empty();
}
/**
* Gets version of the node. When not defined, it will use server version from
* the given configuration.
*
* @param config non-null configuration to get server version
* @return version of the node
*/
public ClickHouseVersion getVersion(ClickHouseConfig config) {
return this.config.hasOption(ClickHouseClientOption.SERVER_VERSION) ? this.config.getServerVersion()
: ClickHouseChecker.nonNull(config, ClickHouseConfig.TYPE_NAME).getServerVersion();
}
/**
* Gets cluster name of the node.
*
* @return cluster name of node
*/
public String getCluster() {
return cluster;
}
/**
* Gets protocol used by the node.
*
* @return protocol used by the node
*/
public ClickHouseProtocol getProtocol() {
return this.protocol;
}
/**
* Checks if preferred database was specified or not. When preferred database
* was not specified, {@link #getDatabase()} will return default database.
*
* @return true if preferred database was specified; false otherwise
*/
public boolean hasPreferredDatabase() {
return this.config.hasOption(ClickHouseClientOption.DATABASE);
}
/**
* Checks whether the node is managed by a {@link ClickHouseCluster} ro
* {@link ClickHouseNodes}.
*
* @return true if the node is managed; false otherwise
*/
public boolean isManaged() {
return manager.get() != null;
}
/**
* Checks whether the node is not managed by any {@link ClickHouseCluster} ro
* {@link ClickHouseNodes}.
*
* @return true if the node is not managed; false otherwise
*/
public boolean isStandalone() {
return manager.get() == null;
}
/**
* Checks if the given node has same base URI as current one.
*
* @param node node to test
* @return true if the nodes are same endpoint; false otherwise
*/
public boolean isSameEndpoint(ClickHouseNode node) {
if (node == null) {
return false;
}
return baseUri.equals(node.baseUri);
}
/**
* Updates status of the node. This will only work when the node is
* managed({@link #isManaged()} returns {@code true}).
*
* @param status non-null node status
*/
public void update(Status status) {
ClickHouseNodeManager m = this.manager.get();
if (m != null) {
m.update(this, status);
}
}
@Override
public ClickHouseNode apply(ClickHouseNodeSelector t) {
final ClickHouseNodeManager m = manager.get();
if (m != null) { // managed
return m.apply(m.getNodeSelector());
}
if (t != null && t != ClickHouseNodeSelector.EMPTY
&& (!t.matchAnyOfPreferredProtocols(protocol) || !t.matchAllPreferredTags(tags))) {
throw new IllegalArgumentException(ClickHouseUtils.format("%s expects a node rather than %s", t, this));
}
return this;
}
@Override
public int hashCode() {
return Objects.hash(host, port, protocol, credentials, options, tags, cluster, replicaNum, shardNum,
shardWeight, weight);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (obj == null || getClass() != obj.getClass()) {
return false;
}
ClickHouseNode other = (ClickHouseNode) obj;
return host.equals(other.host) && port == other.port && protocol == other.protocol
&& Objects.equals(credentials, other.credentials) && options.equals(other.options)
&& tags.equals(other.tags) && cluster.equals(other.cluster) && replicaNum == other.replicaNum
&& shardNum == other.shardNum && shardWeight == other.shardWeight && weight == other.weight;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder().append("ClickHouseNode [uri=").append(baseUri)
.append(config.getDatabase());
if (!cluster.isEmpty()) {
builder.append(", cluster=").append(cluster).append("(s").append(shardNum).append(",w").append(shardWeight)
.append(",r").append(replicaNum).append(')');
}
Map m = ClickHouseConfig.ClientOptions.INSTANCE.sensitiveOptions;
StringBuilder optsBuilder = new StringBuilder();
for (Entry option : options.entrySet()) {
String key = option.getKey();
if (!ClickHouseClientOption.DATABASE.getKey().equals(key)
&& !ClickHouseClientOption.SSL.getKey().equals(key)) {
optsBuilder.append(key).append('=').append(m.containsKey(key) ? "*" : option.getValue()).append(',');
}
}
if (optsBuilder.length() > 0) {
optsBuilder.setLength(optsBuilder.length() - 1);
builder.append(", options={").append(optsBuilder).append('}');
}
if (!tags.isEmpty()) {
builder.append(", tags=").append(tags);
}
return builder.append("]@").append(hashCode()).toString();
}
/**
* Converts to URI, without credentials for security reason.
*
* @return non-null URI
*/
public URI toUri() {
return toUri(null);
}
/**
* Converts to URI, without credentials for security reason.
*
* @param schemePrefix optional prefix of scheme
* @return non-null URI
*/
public URI toUri(String schemePrefix) {
StringBuilder builder = new StringBuilder();
String db = getDatabase().orElse(null);
for (Entry entry : options.entrySet()) {
if (ClickHouseClientOption.DATABASE.getKey().equals(entry.getKey())) {
db = entry.getValue();
continue;
}
builder.append(entry.getKey()).append('=').append(entry.getValue()).append('&');
}
String query = null;
if (builder.length() > 0) {
builder.setLength(builder.length() - 1);
query = builder.toString();
}
builder.setLength(0);
boolean first = true;
for (String tag : tags) {
if (first) {
first = false;
} else {
builder.append(',');
}
builder.append(ClickHouseUtils.encode(tag));
}
String p = protocol.name().toLowerCase(Locale.ROOT);
if (ClickHouseChecker.isNullOrEmpty(schemePrefix)) {
schemePrefix = p;
} else {
if (schemePrefix.charAt(schemePrefix.length() - 1) == ':') {
schemePrefix = schemePrefix.concat(p);
} else {
schemePrefix = new StringBuilder(schemePrefix).append(':').append(p).toString();
}
}
try {
return new URI(schemePrefix, null, host, port, ClickHouseChecker.isNullOrEmpty(db) ? "" : "/".concat(db),
query, builder.length() > 0 ? builder.toString() : null);
} catch (URISyntaxException e) {
throw new IllegalStateException(e);
}
}
}