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The ATSD Client for Java enables Java developers to easily read
and write statistics and metadata from Axibase Time-Series Database. Build reporting,
analytics, and alerting solutions with minimal effort.
/*
* Copyright 2016 Axibase Corporation or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* https://www.axibase.com/atsd/axibase-apache-2.0.pdf
*
* or in the "license" file accompanying this file. This file 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 com.axibase.tsd.client;
import com.axibase.tsd.model.system.ClientConfiguration;
import com.axibase.tsd.model.system.ServerError;
import com.axibase.tsd.query.QueryPart;
import com.fasterxml.jackson.jaxrs.base.JsonMappingExceptionMapper;
import com.fasterxml.jackson.jaxrs.base.JsonParseExceptionMapper;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.AllowAllHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.StrictHostnameVerifier;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.glassfish.jersey.SslConfigurator;
import org.glassfish.jersey.apache.connector.ApacheClientProperties;
import org.glassfish.jersey.apache.connector.ApacheConnectorProvider;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.client.ClientProperties;
import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
import org.glassfish.jersey.filter.LoggingFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.bridge.SLF4JBridgeHandler;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import java.io.InputStream;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Collections;
import java.util.List;
import java.util.logging.LogManager;
import static javax.ws.rs.core.MediaType.APPLICATION_JSON_TYPE;
@Slf4j
class HttpClient {
private final static java.util.logging.Logger legacyLogger = java.util.logging.Logger.getLogger(HttpClient.class.getName());
public static final int HTTP_STATUS_OK = 200;
public static final int HTTP_STATUS_FAIL = 400;
public static final int HTTP_STATUS_NOT_FOUND = 404;
static {
SLF4JBridgeHandler.removeHandlersForRootLogger();
LogManager.getLogManager().reset();
SLF4JBridgeHandler.install();
}
private ClientConfiguration clientConfiguration;
private final Client client;
HttpClient(ClientConfiguration clientConfiguration) {
client = buildClient(clientConfiguration);
this.clientConfiguration = clientConfiguration;
}
private static Client buildClient(ClientConfiguration clientConfiguration) {
ClientConfig clientConfig = new ClientConfig();
clientConfig
.register(JsonMappingExceptionMapper.class)
.register(JsonParseExceptionMapper.class)
.register(JacksonJaxbJsonProvider.class, new Class[]{MessageBodyReader.class, MessageBodyWriter.class})
.register(RequestBodyLogger.class)
.register(HttpAuthenticationFeature.basic(clientConfiguration.getUsername(), clientConfiguration.getPassword()))
;
if (clientConfiguration.isEnableBatchCompression()) {
clientConfig.register(GZipWriterInterceptor.class);
}
if (log.isDebugEnabled()) {
clientConfig.register(new LoggingFilter(legacyLogger, true));
}
configureHttps(clientConfiguration, clientConfig);
clientConfig.connectorProvider(new ApacheConnectorProvider());
Client builtClient = ClientBuilder.newBuilder().withConfig(clientConfig).build();
builtClient.property(ClientProperties.CONNECT_TIMEOUT, clientConfiguration.getConnectTimeoutMillis());
builtClient.property(ClientProperties.READ_TIMEOUT, clientConfiguration.getReadTimeoutMillis());
return builtClient;
}
private static void configureHttps(ClientConfiguration clientConfiguration, ClientConfig clientConfig) {
SslConfigurator sslConfig = SslConfigurator.newInstance().securityProtocol("SSL");
PoolingHttpClientConnectionManager connectionManager = createConnectionManager(clientConfiguration, sslConfig);
clientConfig.property(ApacheClientProperties.CONNECTION_MANAGER, connectionManager);
clientConfig.property(ApacheClientProperties.SSL_CONFIG, sslConfig);
}
public static PoolingHttpClientConnectionManager createConnectionManager(ClientConfiguration clientConfiguration, SslConfigurator sslConfig) {
SSLContext sslContext = sslConfig.createSSLContext();
X509HostnameVerifier hostnameVerifier;
if (clientConfiguration.isIgnoreSSLErrors()) {
ignoreSslCertificateErrorInit(sslContext);
hostnameVerifier = new AllowAllHostnameVerifier();
} else {
hostnameVerifier = new StrictHostnameVerifier();
}
LayeredConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(
sslContext,
hostnameVerifier);
final Registry registry = RegistryBuilder.create()
.register("http", PlainConnectionSocketFactory.getSocketFactory())
.register("https", sslSocketFactory)
.build();
return new PoolingHttpClientConnectionManager(registry);
}
private static void ignoreSslCertificateErrorInit(SSLContext sslContext) {
try {
sslContext.init(null, new TrustManager[]{
new IgnoringTrustManager()
}, new SecureRandom());
} catch (KeyManagementException | NoSuchAlgorithmException | KeyStoreException e) {
log.warn("SSL context initialization error: ", e);
}
}
public List requestMetaDataList(Class clazz, QueryPart query) {
return requestList(clientConfiguration.getMetadataUrl(), clazz, query, null);
}
public T requestMetaDataObject(Class clazz, QueryPart query) {
return requestObject(clientConfiguration.getMetadataUrl(), clazz, query, null);
}
public boolean updateMetaData(QueryPart query, RequestProcessor requestProcessor) {
return update(clientConfiguration.getMetadataUrl(), query, requestProcessor);
}
public boolean updateData(QueryPart query, RequestProcessor requestProcessor) {
return update(clientConfiguration.getDataUrl(), query, requestProcessor);
}
public boolean updateData(QueryPart query, String data) {
return update(clientConfiguration.getDataUrl(), query, RequestProcessor.post(data), MediaType.TEXT_PLAIN_TYPE);
}
public Response request(QueryPart query, RequestProcessor requestProcessor) {
String url = clientConfiguration.getDataUrl();
return doRequest(url, query, requestProcessor);
}
public Response request(QueryPart query, String data) {
return doRequest(clientConfiguration.getDataUrl(), query, RequestProcessor.post(data), MediaType.TEXT_PLAIN_TYPE);
}
public List requestDataList(Class clazz, QueryPart query, RequestProcessor requestProcessor) {
String url = clientConfiguration.getDataUrl();
return requestList(url, clazz, query, requestProcessor);
}
public T requestData(Class clazz, QueryPart query, RequestProcessor requestProcessor) {
String url = clientConfiguration.getDataUrl();
return requestObject(url, clazz, query, requestProcessor);
}
private List requestList(String url, Class resultClass, QueryPart query, RequestProcessor requestProcessor) {
Response response = doRequest(url, query, requestProcessor);
if (response.getStatus() == HTTP_STATUS_OK) {
return response.readEntity(listType(resultClass));
} else if (response.getStatus() == HTTP_STATUS_NOT_FOUND) {
return Collections.emptyList();
} else {
throw buildException(response);
}
}
private T requestObject(String url, Class resultClass, QueryPart query, RequestProcessor requestProcessor) {
Response response = doRequest(url, query, requestProcessor);
if (response.getStatus() == HTTP_STATUS_OK) {
return response.readEntity(resultClass);
} else if (response.getStatus() == HTTP_STATUS_NOT_FOUND) {
buildAndLogServerError(response);
return null;
} else {
throw buildException(response);
}
}
public InputStream requestInputStream(QueryPart query, RequestProcessor requestProcessor) {
String url = clientConfiguration.getDataUrl();
Response response = doRequest(url, query, requestProcessor);
Object entity = response.getEntity();
if (response.getStatus() == HTTP_STATUS_OK && entity instanceof InputStream) {
return (InputStream) entity;
} else {
throw buildException(response);
}
}
private boolean update(String url, QueryPart query, RequestProcessor requestProcessor) {
Response response = doRequest(url, query, requestProcessor);
return getUpdateResult(response);
}
private boolean update(String url, QueryPart query, RequestProcessor requestProcessor, MediaType mediaType) {
Response response = doRequest(url, query, requestProcessor, mediaType);
return getUpdateResult(response);
}
private boolean getUpdateResult(Response response) {
try {
if (response.getStatus() == HTTP_STATUS_OK) {
return true;
} else if (response.getStatus() == HTTP_STATUS_FAIL) {
return false;
} else {
throw buildException(response);
}
} finally {
closeResponse(response);
}
}
private AtsdServerException buildException(Response response) {
ServerError serverError = buildAndLogServerError(response);
return new AtsdServerException(response.getStatusInfo().getReasonPhrase() + " (" + response.getStatus() + ")" +
((serverError == null) ? "" : (", " + serverError.getMessage())), response.getStatus());
}
public static ServerError buildAndLogServerError(Response response) {
ServerError serverError = null;
try {
serverError = response.readEntity(ServerError.class);
log.warn("Server error: {}", serverError);
} catch (Throwable e) {
log.warn("Couldn't read error message", e);
}
return serverError;
}
private Response doRequest(String url, QueryPart query, RequestProcessor requestProcessor) {
return doRequest(url, query, requestProcessor, APPLICATION_JSON_TYPE);
}
private Response doRequest(String url, QueryPart query, RequestProcessor requestProcessor, MediaType mediaType) {
WebTarget target = client.target(url);
target = query.fill(target);
log.debug("url = {}", target.getUri());
Invocation.Builder request = target.request(mediaType);
Response response = null;
try {
if (requestProcessor == null) {
response = request.get();
} else {
response = requestProcessor.process(request, mediaType, "command".equals(query.getPath()) && clientConfiguration.isEnableBatchCompression());
}
} catch (Throwable e) {
throw new AtsdClientException("Error while processing the request", e);
}
return response;
}
private GenericType> listType(final Class clazz) {
ParameterizedType genericType = new ParameterizedType() {
public Type[] getActualTypeArguments() {
return new Type[]{clazz};
}
public Type getRawType() {
return List.class;
}
public Type getOwnerType() {
return List.class;
}
};
return new GenericType>(genericType) {
};
}
public void close() {
if (client != null) {
client.close();
}
}
private static void closeResponse(Response response) {
try {
if (response != null) {
response.close();
}
} catch (Throwable e) {
log.warn("Couldn't close response", e);
}
}
}