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ru.yandex.clickhouse.jdbcbridge.JdbcBridgeVerticle Maven / Gradle / Ivy
/**
* Copyright 2019-2021, Zhichun Wu
*
* Licensed 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 ru.yandex.clickhouse.jdbcbridge;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.function.Consumer;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.binder.jvm.ClassLoaderMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmGcMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmMemoryMetrics;
import io.micrometer.core.instrument.binder.jvm.JvmThreadMetrics;
import io.micrometer.core.instrument.binder.system.ProcessorMetrics;
import io.micrometer.core.instrument.binder.system.UptimeMetrics;
import io.vertx.config.ConfigRetriever;
import io.vertx.config.ConfigRetrieverOptions;
import io.vertx.config.ConfigStoreOptions;
import io.vertx.core.AbstractVerticle;
import io.vertx.core.Vertx;
import io.vertx.core.VertxOptions;
import io.vertx.core.http.HttpServer;
import io.vertx.core.http.HttpServerOptions;
import io.vertx.core.http.HttpServerRequest;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.Router;
import io.vertx.ext.web.RoutingContext;
import io.vertx.ext.web.handler.BodyHandler;
import io.vertx.ext.web.handler.ResponseContentTypeHandler;
import io.vertx.ext.web.handler.TimeoutHandler;
import io.vertx.micrometer.MicrometerMetricsOptions;
import io.vertx.micrometer.PrometheusScrapingHandler;
import io.vertx.micrometer.VertxPrometheusOptions;
import ru.yandex.clickhouse.jdbcbridge.core.ByteBuffer;
import ru.yandex.clickhouse.jdbcbridge.core.ColumnDefinition;
import ru.yandex.clickhouse.jdbcbridge.core.TableDefinition;
import ru.yandex.clickhouse.jdbcbridge.core.DataType;
import ru.yandex.clickhouse.jdbcbridge.core.Extension;
import ru.yandex.clickhouse.jdbcbridge.core.ExtensionManager;
import ru.yandex.clickhouse.jdbcbridge.core.NamedDataSource;
import ru.yandex.clickhouse.jdbcbridge.core.NamedQuery;
import ru.yandex.clickhouse.jdbcbridge.core.NamedSchema;
import ru.yandex.clickhouse.jdbcbridge.core.QueryParameters;
import ru.yandex.clickhouse.jdbcbridge.core.QueryParser;
import ru.yandex.clickhouse.jdbcbridge.core.Repository;
import ru.yandex.clickhouse.jdbcbridge.core.RepositoryManager;
import ru.yandex.clickhouse.jdbcbridge.core.ResponseWriter;
import ru.yandex.clickhouse.jdbcbridge.core.Utils;
import ru.yandex.clickhouse.jdbcbridge.impl.ConfigDataSource;
import ru.yandex.clickhouse.jdbcbridge.impl.JdbcDataSource;
import ru.yandex.clickhouse.jdbcbridge.impl.JsonFileRepository;
import ru.yandex.clickhouse.jdbcbridge.impl.ScriptDataSource;
import static ru.yandex.clickhouse.jdbcbridge.core.DataType.*;
/**
* Unified data source bridge for ClickHouse.
*
* @since 2.0
*/
public class JdbcBridgeVerticle extends AbstractVerticle implements ExtensionManager {
private static final org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(JdbcBridgeVerticle.class);
private static volatile long startTime;
private static final String CONFIG_PATH = Utils.getConfiguration("config", "CONFIG_DIR", "jdbc-bridge.config.dir");
private static final boolean SERIAL_MODE = Boolean
.valueOf(Utils.getConfiguration("false", "SERIAL_MODE", "jdbc-bridge.serial.mode"));
private static final int DEFAULT_SERVER_PORT = 9019;
private static final String RESPONSE_CONTENT_TYPE = "application/octet-stream";
private static final String WRITE_RESPONSE = "Ok.";
private static final String PING_RESPONSE = WRITE_RESPONSE + "\n";
private static final String SCHEMA_ALLOWED_RESPONSE = "1\n";
private final List> extensions;
private final RepositoryManager repos;
private long scanInterval = 5000L;
List> loadRepositories(JsonObject serverConfig) {
List> repos = new ArrayList<>();
Extension defaultExt = new Extension<>(JsonFileRepository.class);
JsonArray declaredRepos = serverConfig == null ? null : serverConfig.getJsonArray("repositories");
if (declaredRepos == null) {
// let's go with default extensions
declaredRepos = new JsonArray();
declaredRepos.add(NamedDataSource.class.getName());
declaredRepos.add(NamedSchema.class.getName());
declaredRepos.add(NamedQuery.class.getName());
}
for (Object item : declaredRepos) {
Repository repo = null;
if (item instanceof String) {
repo = defaultExt.newInstance(this, defaultExt.loadClass(String.valueOf(item)));
} else {
JsonObject o = (JsonObject) item;
String entityClassName = o.getString("entity");
if (entityClassName == null || entityClassName.isEmpty()) {
continue;
}
String repoClassName = o.getString("repository");
ArrayList urls = null;
JsonArray libUrls = o.getJsonArray("libUrls");
if (repoClassName != null && !repoClassName.isEmpty() && libUrls != null) {
urls = new ArrayList<>(libUrls.size());
for (Object u : libUrls) {
if (u instanceof String) {
urls.add((String) u);
}
}
}
Extension ext = Utils.loadExtension(urls, repoClassName);
if (ext != null) {
repo = (Repository) ext.newInstance(this, ext.loadClass(entityClassName));
}
}
if (repo != null) {
repos.add(repo);
}
}
return repos;
}
List> loadExtensions(JsonObject serverConfig) {
List> exts = new ArrayList<>();
JsonArray declaredExts = serverConfig == null ? null : serverConfig.getJsonArray("extensions");
if (declaredExts == null) {
// let's go with default extensions
declaredExts = new JsonArray();
declaredExts.add(JdbcDataSource.class.getName());
declaredExts.add(ConfigDataSource.class.getName());
declaredExts.add(ScriptDataSource.class.getName());
}
for (Object item : declaredExts) {
Extension ext = null;
if (item instanceof String) {
ext = Utils.loadExtension((String) item);
} else {
JsonObject o = (JsonObject) item;
String className = o.getString("class");
JsonArray libUrls = o.getJsonArray("libUrls");
if (libUrls != null) {
ArrayList urls = new ArrayList<>(libUrls.size());
for (Object u : libUrls) {
if (u instanceof String) {
urls.add((String) u);
}
}
// FIXME duplicated extensions?
ext = Utils.loadExtension(urls, className);
} else {
ext = Utils.loadExtension(className);
}
}
if (ext != null) {
exts.add(ext);
}
}
return exts;
}
public JdbcBridgeVerticle() {
super();
this.extensions = new ArrayList<>();
this.repos = Utils.loadService(RepositoryManager.class);
}
@Override
public void start() {
JsonObject config = Utils.loadJsonFromFile(Paths
.get(CONFIG_PATH,
Utils.getConfiguration("server.json", "SERVER_CONFIG_FILE", "jdbc-bridge.server.config.file"))
.toString());
this.scanInterval = config.getLong("configScanPeriod", 5000L);
this.repos.update(this.loadRepositories(config));
// extension must be loaded *after* repository is initialized
this.extensions.addAll(this.loadExtensions(config));
// initialize extensions so that they're fully ready for use
for (Extension ext : this.extensions) {
ext.initialize(this);
}
startServer(config,
Utils.loadJsonFromFile(Paths.get(CONFIG_PATH,
Utils.getConfiguration("httpd.json", "HTTPD_CONFIG_FILE", "jdbc-bridge.httpd.config.file"))
.toString()));
}
private void startServer(JsonObject bridgeServerConfig, JsonObject httpServerConfig) {
if (httpServerConfig.isEmpty()) {
// make sure we can pass long query/script by default
httpServerConfig.put("maxInitialLineLength", 2147483647L);
}
HttpServer server = vertx.createHttpServer(new HttpServerOptions(httpServerConfig));
// vertx.createHttpServer(new
// HttpServerOptions().setTcpNoDelay(false).setTcpKeepAlive(true)
// .setTcpFastOpen(true).setLogActivity(true));
long requestTimeout = bridgeServerConfig.getLong("requestTimeout", 5000L);
long queryTimeout = Math.max(requestTimeout, bridgeServerConfig.getLong("queryTimeout", 60000L));
TimeoutHandler requestTimeoutHandler = TimeoutHandler.create(requestTimeout);
TimeoutHandler queryTimeoutHandler = TimeoutHandler.create(queryTimeout);
// https://github.com/vert-x3/vertx-examples/blob/master/web-examples/src/main/java/io/vertx/example/web/mongo/Server.java
Router router = Router.router(vertx);
router.route("/metrics").handler(PrometheusScrapingHandler.create());
router.route().handler(BodyHandler.create()).handler(this::responseHandlers)
.handler(ResponseContentTypeHandler.create()).failureHandler(this::errorHandler);
// stateless endpoints
router.get("/ping").handler(requestTimeoutHandler).handler(this::handlePing);
router.get("/schema_allowed").handler(requestTimeoutHandler).handler(this::handleSchemaAllowed);
router.post("/identifier_quote").produces(RESPONSE_CONTENT_TYPE).handler(requestTimeoutHandler)
.handler(this::handleIdentifierQuote);
router.post("/columns_info").produces(RESPONSE_CONTENT_TYPE).handler(queryTimeoutHandler)
.handler(this::handleColumnsInfo);
router.post("/").produces(RESPONSE_CONTENT_TYPE).handler(queryTimeoutHandler).blockingHandler(this::handleQuery,
SERIAL_MODE);
router.post("/write").produces(RESPONSE_CONTENT_TYPE).handler(queryTimeoutHandler)
.blockingHandler(this::handleWrite, SERIAL_MODE);
log.info("Starting web server...");
int port = bridgeServerConfig.getInteger("serverPort", DEFAULT_SERVER_PORT);
server.requestHandler(router).listen(port, action -> {
if (action.succeeded()) {
log.info("Server http://0.0.0.0:{} started in {} ms", port, System.currentTimeMillis() - startTime);
} else {
log.error("Failed to start server", action.cause());
}
});
}
private void responseHandlers(RoutingContext ctx) {
HttpServerRequest req = ctx.request();
String path = ctx.normalisedPath();
if (log.isDebugEnabled()) {
log.debug("[{}] Context:\n{}", path, ctx.data());
log.debug("[{}] Headers:\n{}", path, req.headers());
log.debug("[{}] Parameters:\n{}", path, req.params());
}
// bad assumption here as it may lead to UTF8 decode issue like #83
// if (log.isTraceEnabled()) {
// log.trace("[{}] Body:\n{}", path, ctx.getBodyAsString());
// }
ctx.response().endHandler(handler -> {
if (log.isTraceEnabled()) {
log.trace("[{}] About to end response...", ctx.normalisedPath());
}
}).closeHandler(handler -> {
if (log.isTraceEnabled()) {
log.trace("[{}] About to close response...", ctx.normalisedPath());
}
}).drainHandler(handler -> {
if (log.isTraceEnabled()) {
log.trace("[{}] About to drain response...", ctx.normalisedPath());
}
}).exceptionHandler(throwable -> {
log.error("Caught exception", throwable);
});
ctx.next();
}
private void errorHandler(RoutingContext ctx) {
log.error("Failed to respond", ctx.failure());
ctx.response().setStatusCode(500).end(ctx.failure().getMessage());
}
private void handlePing(RoutingContext ctx) {
ctx.response().end(PING_RESPONSE);
}
private void handleSchemaAllowed(RoutingContext ctx) {
// TODO some datasources do not support schema
ctx.response().end(SCHEMA_ALLOWED_RESPONSE);
}
private NamedDataSource getDataSource(String uri, boolean orCreate) {
return getDataSource(getDataSourceRepository(), uri, orCreate);
}
private NamedDataSource getDataSource(Repository repo, String uri, boolean orCreate) {
NamedDataSource ds = repo.get(uri);
return ds == null && orCreate ? new NamedDataSource(uri, null, null) : ds;
}
private void handleColumnsInfo(RoutingContext ctx) {
final QueryParser parser = QueryParser.fromRequest(ctx, getDataSourceRepository());
// priority: named/inline schema -> named query -> type inferring
TableDefinition tableDef = null;
// check if we got named schema first
String rawSchema = parser.getRawSchema();
NamedSchema namedSchema = getSchemaRepository().get(rawSchema);
if (namedSchema == null) { // try harder as we may got an inline schema
String schema = parser.getNormalizedSchema();
if (schema.indexOf(' ') != -1) {
if (log.isDebugEnabled()) {
log.debug("Got inline schema:\n[{}]", schema);
}
tableDef = TableDefinition.fromString(schema);
}
} else {
if (log.isDebugEnabled()) {
log.debug("Got named schema:\n[{}]", namedSchema);
}
tableDef = namedSchema.getColumns();
}
String rawQuery = parser.getRawQuery();
log.info("Raw query:\n{}", rawQuery);
String uri = parser.getConnectionString();
QueryParameters params = parser.getQueryParameters();
NamedDataSource ds = getDataSource(uri, params.isDebug());
String dsId = uri;
if (ds != null) {
dsId = ds.getId();
params = ds.newQueryParameters(params);
}
if (tableDef == null) {
// even it's a named query, the column list could be empty
NamedQuery namedQuery = getQueryRepository().get(rawQuery);
if (namedQuery != null) {
if (namedSchema == null) {
namedSchema = getSchemaRepository().get(namedQuery.getSchema());
}
tableDef = namedSchema != null ? namedSchema.getColumns() : namedQuery.getColumns();
} else {
tableDef = namedSchema != null ? namedSchema.getColumns()
: ds.getResultColumns(rawSchema, parser.getNormalizedQuery(), params);
}
}
List additionalColumns = new ArrayList();
if (params.showDatasourceColumn()) {
additionalColumns.add(new ColumnDefinition(TableDefinition.COLUMN_DATASOURCE, DataType.Str, true,
DEFAULT_LENGTH, DEFAULT_PRECISION, DEFAULT_SCALE, null, dsId, null));
}
if (params.showCustomColumns() && ds != null) {
additionalColumns.addAll(ds.getCustomColumns());
}
if (additionalColumns.size() > 0) {
tableDef = new TableDefinition(tableDef, true,
additionalColumns.toArray(new ColumnDefinition[additionalColumns.size()]));
}
String columnsInfo = tableDef.toString();
if (log.isDebugEnabled()) {
log.debug("Columns info:\n[{}]", columnsInfo);
}
ctx.response().end(ByteBuffer.asBuffer(columnsInfo));
}
private void handleIdentifierQuote(RoutingContext ctx) {
// don't want to repeat datasource lookup here
ctx.response().end(ByteBuffer.asBuffer(NamedDataSource.DEFAULT_QUOTE_IDENTIFIER));
}
private void handleQuery(RoutingContext ctx) {
final Repository manager = getDataSourceRepository();
final QueryParser parser = QueryParser.fromRequest(ctx, manager);
final HttpServerResponse resp = ctx.response().setChunked(true);
if (log.isTraceEnabled()) {
log.trace("About to execute query...");
}
QueryParameters params = parser.getQueryParameters();
NamedDataSource ds = getDataSource(manager, parser.getConnectionString(), params.isDebug());
params = ds.newQueryParameters(params);
String rawSchema = parser.getRawSchema();
NamedSchema namedSchema = getSchemaRepository().get(rawSchema);
String generatedQuery = parser.getRawQuery();
String normalizedQuery = parser.getNormalizedQuery();
// try if it's a named query first
NamedQuery namedQuery = getQueryRepository().get(normalizedQuery);
// in case the "query" is a local file...
normalizedQuery = ds.loadSavedQueryAsNeeded(normalizedQuery, params);
if (log.isDebugEnabled()) {
log.debug("Generated query:\n{}\nNormalized query:\n{}", generatedQuery, normalizedQuery);
}
ResponseWriter writer = new ResponseWriter(resp, parser.getStreamOptions(),
ds.getQueryTimeout(params.getTimeout()));
long executionStartTime = System.currentTimeMillis();
if (namedQuery != null) {
if (log.isDebugEnabled()) {
log.debug("Found named query: [{}]", namedQuery);
}
if (namedSchema == null) {
namedSchema = getSchemaRepository().get(namedQuery.getSchema());
}
// columns in request might just be a subset of defined list
// for example:
// - named query 'test' is: select a, b, c from table
// - clickhouse query: select b, a from jdbc('?','','test')
// - requested columns: b, a
ds.executeQuery(rawSchema, namedQuery, namedSchema != null ? namedSchema.getColumns() : parser.getTable(),
params, writer);
} else {
// columnsInfo could be different from what we responded earlier, so let's parse
// it again
TableDefinition queryColumns = namedSchema != null ? namedSchema.getColumns() : parser.getTable();
// unfortunately default values will be lost between two requests, so we have to
// add it back...
List additionalColumns = new ArrayList();
if (params.showDatasourceColumn()) {
additionalColumns.add(new ColumnDefinition(TableDefinition.COLUMN_DATASOURCE, DataType.Str, true,
DEFAULT_LENGTH, DEFAULT_PRECISION, DEFAULT_SCALE, null, ds.getId(), null));
}
if (params.showCustomColumns()) {
additionalColumns.addAll(ds.getCustomColumns());
}
queryColumns.updateValues(additionalColumns);
ds.executeQuery(namedSchema == null ? rawSchema : Utils.EMPTY_STRING, parser.getNormalizedQuery(),
normalizedQuery, queryColumns, params, writer);
}
if (log.isDebugEnabled()) {
log.debug("Completed execution in {} ms.", System.currentTimeMillis() - executionStartTime);
}
resp.end();
}
// https://github.com/ClickHouse/ClickHouse/blob/bee5849c6a7dba20dbd24dfc5fd5a786745d90ff/programs/odbc-bridge/MainHandler.cpp#L169
private void handleWrite(RoutingContext ctx) {
final Repository manager = getDataSourceRepository();
final QueryParser parser = QueryParser.fromRequest(ctx, manager, true);
final HttpServerResponse resp = ctx.response().setChunked(true);
if (log.isTraceEnabled()) {
log.trace("About to execute mutation...");
}
QueryParameters params = parser.getQueryParameters();
NamedDataSource ds = getDataSource(manager, parser.getConnectionString(), params.isDebug());
params = ds == null ? params : ds.newQueryParameters(params);
final String generatedQuery = parser.getRawQuery();
String normalizedQuery = parser.getNormalizedQuery();
if (log.isDebugEnabled()) {
log.debug("Generated query:\n{}\nNormalized query:\n{}", generatedQuery, normalizedQuery);
}
// try if it's a named query first
NamedQuery namedQuery = getQueryRepository().get(normalizedQuery);
// in case the "query" is a local file...
normalizedQuery = ds.loadSavedQueryAsNeeded(normalizedQuery, params);
// TODO: use named schema as table name?
String table = parser.getRawQuery();
if (namedQuery != null) {
table = parser.extractTable(ds.loadSavedQueryAsNeeded(namedQuery.getQuery(), params));
} else {
table = parser.extractTable(ds.loadSavedQueryAsNeeded(normalizedQuery, params));
}
ResponseWriter writer = new ResponseWriter(resp, parser.getStreamOptions(),
ds.getWriteTimeout(params.getTimeout()));
ds.executeMutation(parser.getRawSchema(), table, parser.getTable(), params, ByteBuffer.wrap(ctx.getBody()),
writer);
if (writer.isOpen()) {
resp.end(ByteBuffer.asBuffer(WRITE_RESPONSE));
}
}
private Repository getDataSourceRepository() {
return getRepositoryManager().getRepository(NamedDataSource.class);
}
private Repository getSchemaRepository() {
return getRepositoryManager().getRepository(NamedSchema.class);
}
private Repository getQueryRepository() {
return getRepositoryManager().getRepository(NamedQuery.class);
}
@SuppressWarnings("unchecked")
@Override
public Extension getExtension(Class clazz) {
String className = Objects.requireNonNull(clazz).getName();
Extension ext = null;
for (Extension e : this.extensions) {
if (e.getProviderClass().getName().equals(className)) {
ext = (Extension) e;
}
}
return ext;
}
@Override
public RepositoryManager getRepositoryManager() {
return this.repos;
}
@Override
public void registerConfigLoader(String configPath, Consumer consumer) {
final String path = Paths.get(CONFIG_PATH, configPath).toString();
log.info("Start to monitor configuration file(s) at [{}]", path);
ConfigRetriever retriever = ConfigRetriever.create(vertx,
new ConfigRetrieverOptions().setScanPeriod(this.scanInterval)
.addStore(new ConfigStoreOptions().setType("directory")
.setConfig(new JsonObject().put("path", path).put("filesets", new JsonArray()
.add(new JsonObject().put("pattern", "*.json").put("format", "json"))))));
retriever.getConfig(action -> {
if (action.succeeded()) {
vertx.executeBlocking(promise -> {
consumer.accept(action.result());
}, true, res -> {
if (!res.succeeded()) {
log.error("Failed to load configuration", res.cause());
}
});
} else {
log.warn("Not able to load configuration from [{}] due to {}", path, action.cause().getMessage());
}
});
retriever.listen(change -> {
log.info("Configuration change in [{}] detected", path);
vertx.executeBlocking(promise -> {
consumer.accept(change.getNewConfiguration());
}, true, res -> {
if (!res.succeeded()) {
log.error("Failed to reload configuration", res.cause());
}
});
});
}
@Override
public Map getScriptableObjects() {
Map vars = new HashMap<>();
// TODO and some utilities?
vars.put("__vertx", vertx);
vars.put("__datasources", getDataSourceRepository());
vars.put("__schemas", getSchemaRepository());
vars.put("__queries", getQueryRepository());
return vars;
}
public static void main(String[] args) {
startTime = System.currentTimeMillis();
VertxOptions options = new VertxOptions(Utils.loadJsonFromFile(Paths
.get(CONFIG_PATH,
Utils.getConfiguration("vertx.json", "VERTX_CONFIG_FILE", "jdbc-bridge.vertx.config.file"))
.toString()));
Object metricRegistry = Utils.getDefaultMetricRegistry();
// only MicroMeter is supported at this point
if (metricRegistry instanceof MeterRegistry) {
MeterRegistry registry = (MeterRegistry) metricRegistry;
new ClassLoaderMetrics().bindTo(registry);
new JvmGcMetrics().bindTo(registry);
new JvmMemoryMetrics().bindTo(registry);
new JvmThreadMetrics().bindTo(registry);
new ProcessorMetrics().bindTo(registry);
new UptimeMetrics().bindTo(registry);
options.setMetricsOptions(
new MicrometerMetricsOptions().setPrometheusOptions(new VertxPrometheusOptions().setEnabled(true))
.setMicrometerRegistry(registry).setEnabled(true));
}
// https://github.com/eclipse-vertx/vert.x/blob/master/src/main/generated/io/vertx/core/VertxOptionsConverter.java
Vertx vertx = Vertx.vertx(options);
vertx.deployVerticle(new JdbcBridgeVerticle());
}
}
