com.ing.data.cassandra.jdbc.utils.DriverUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-jdbc-wrapper Show documentation
Show all versions of cassandra-jdbc-wrapper Show documentation
JDBC wrapper of the Java Driver for Apache Cassandra®.
/*
*
* 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 com.ing.data.cassandra.jdbc.utils;
import com.ing.data.cassandra.jdbc.metadata.VersionedMetadata;
import org.apache.commons.lang3.StringUtils;
import org.semver4j.RangesExpression;
import org.semver4j.Semver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Properties;
import java.util.stream.Collectors;
/**
* A set of static utility methods and constants used by the JDBC driver.
*/
public final class DriverUtil {
/**
* Properties file name containing some properties relative to this JDBC wrapper (such as JDBC driver version,
* name, etc.).
*/
public static final String JDBC_DRIVER_PROPERTIES_FILE = "jdbc-driver.properties";
/**
* The JSSE property used to retrieve the trust store when SSL is enabled on the database connection using
* JSSE properties.
*/
public static final String JSSE_TRUSTSTORE_PROPERTY = "javax.net.ssl.trustStore";
/**
* The JSSE property used to retrieve the trust store password when SSL is enabled on the database connection using
* JSSE properties.
*/
public static final String JSSE_TRUSTSTORE_PASSWORD_PROPERTY = "javax.net.ssl.trustStorePassword";
/**
* The JSSE property used to retrieve the key store when SSL is enabled on the database connection using
* JSSE properties.
*/
public static final String JSSE_KEYSTORE_PROPERTY = "javax.net.ssl.keyStore";
/**
* The JSSE property used to retrieve the key store password when SSL is enabled on the database connection using
* JSSE properties.
*/
public static final String JSSE_KEYSTORE_PASSWORD_PROPERTY = "javax.net.ssl.keyStorePassword";
/**
* {@code NULL} CQL keyword.
*/
public static final String NULL_KEYWORD = "NULL";
/**
* Cassandra version 5.0. Used for types and built-in functions versioning.
*/
public static final String CASSANDRA_5 = "5.0";
/**
* Cassandra version 4.0. Used for types and built-in functions versioning.
*/
public static final String CASSANDRA_4 = "4.0";
static final Logger LOG = LoggerFactory.getLogger(DriverUtil.class);
private DriverUtil() {
// Private constructor to hide the public one.
}
/**
* Gets a property value from the Cassandra JDBC driver properties file.
*
* @param name The name of the property.
* @return The property value or an empty string the value cannot be retrieved.
*/
public static String getDriverProperty(final String name) {
try (final InputStream propertiesFile =
DriverUtil.class.getClassLoader().getResourceAsStream(JDBC_DRIVER_PROPERTIES_FILE)) {
final Properties driverProperties = new Properties();
driverProperties.load(propertiesFile);
return driverProperties.getProperty(name, StringUtils.EMPTY);
} catch (IOException ex) {
LOG.error("Unable to get JDBC driver property: {}.", name, ex);
return StringUtils.EMPTY;
}
}
/**
* Gets the {@link Semver} representation of a version string.
*
* It uses the dot character as separator to parse the different parts of a version (major, minor, patch).
*
*
* @param version The version string (for example X.Y.Z).
* @return The parsed version, or {@link Semver#ZERO} if the string cannot be parsed correctly.
*/
public static Semver safeParseVersion(final String version) {
if (StringUtils.isBlank(version)) {
return Semver.ZERO;
} else {
final Semver parsedVersion = Semver.coerce(version);
if (parsedVersion == null) {
return Semver.ZERO;
}
return parsedVersion;
}
}
/**
* Checks whether the database metadata (CQL type or built-in function) exists in the current database version.
*
* @param dbVersion The version of the Cassandra database the driver is currently connected to.
* @param versionedMetadata The database metadata to check.
* @return {@code true} if the database metadata exists in the current database version, {@code false} otherwise.
*/
public static boolean existsInDatabaseVersion(final String dbVersion,
final VersionedMetadata versionedMetadata) {
final Semver parseDatabaseVersion = Semver.coerce(dbVersion);
if (parseDatabaseVersion == null) {
return false;
}
Semver minVersion = Semver.ZERO;
if (versionedMetadata.isValidFrom() != null) {
minVersion = versionedMetadata.isValidFrom();
}
final RangesExpression validRange = RangesExpression.greaterOrEqual(minVersion);
if (versionedMetadata.isInvalidFrom() != null) {
validRange.and(RangesExpression.less(versionedMetadata.isInvalidFrom()));
}
return parseDatabaseVersion.satisfies(validRange);
}
/**
* Builds an alphabetically sorted and comma-separated list of metadata (such as built-in functions or CQL
* keywords) existing in the specified Cassandra version.
*
* @param metadataList The list of possible metadata to format.
* @param dbVersion The version of the Cassandra database the driver is currently connected to.
* @return The formatted list of metadata.
*/
public static String buildMetadataList(final List metadataList, final String dbVersion) {
return metadataList.stream()
.filter(metadata -> existsInDatabaseVersion(dbVersion, metadata))
.map(VersionedMetadata::getName)
.sorted()
.collect(Collectors.joining(","));
}
}