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Add ClasspathURLProvider implementation that reads environment variables
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45 changes: 45 additions & 0 deletions
45
...he/shardingsphere/driver/jdbc/core/driver/spi/classpath/AbstractClasspathURLProvider.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
|
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| package org.apache.shardingsphere.driver.jdbc.core.driver.spi.classpath; | ||
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| import com.google.common.base.Preconditions; | ||
| import org.apache.shardingsphere.driver.jdbc.core.driver.ShardingSphereURLProvider; | ||
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| import java.io.InputStream; | ||
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| /** | ||
| * Abstract classpath URL provider. | ||
| */ | ||
| public abstract class AbstractClasspathURLProvider implements ShardingSphereURLProvider { | ||
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| String getConfigurationFile(final String url, final String urlPrefix, final String typePrefix) { | ||
| String configuredFile = url.substring(urlPrefix.length(), url.contains("?") ? url.indexOf('?') : url.length()); | ||
| String file = configuredFile.substring(typePrefix.length()); | ||
| Preconditions.checkArgument(!file.isEmpty(), "Configuration file is required in ShardingSphere URL."); | ||
| return file; | ||
| } | ||
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| InputStream getResourceAsStream(final String resource) { | ||
| InputStream result = Thread.currentThread().getContextClassLoader().getResourceAsStream(resource); | ||
| result = null == result ? Thread.currentThread().getContextClassLoader().getResourceAsStream("/" + resource) : result; | ||
| if (null != result) { | ||
| return result; | ||
| } | ||
| throw new IllegalArgumentException(String.format("Can not find configuration file `%s`.", resource)); | ||
| } | ||
| } |
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96 changes: 96 additions & 0 deletions
96
...dingsphere/driver/jdbc/core/driver/spi/classpath/ClasspathWithEnvironmentURLProvider.java
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| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
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| package org.apache.shardingsphere.driver.jdbc.core.driver.spi.classpath; | ||
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| import com.google.common.base.Strings; | ||
| import lombok.SneakyThrows; | ||
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| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
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| /** | ||
| * Classpath with environment variables URL provider. | ||
| */ | ||
| public final class ClasspathWithEnvironmentURLProvider extends AbstractClasspathURLProvider { | ||
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| private static final String TYPE_PREFIX = "classpath-environment:"; | ||
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| private static final String KEY_VALUE_SEPARATOR = "::"; | ||
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| @SuppressWarnings("RegExpRedundantEscape") | ||
| private static final Pattern PATTERN = Pattern.compile("\\$\\$\\{(.+::.*)\\}$"); | ||
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| @Override | ||
| public boolean accept(final String url) { | ||
| return !Strings.isNullOrEmpty(url) && url.contains(TYPE_PREFIX); | ||
| } | ||
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| @Override | ||
| @SneakyThrows(IOException.class) | ||
| public byte[] getContent(final String url, final String urlPrefix) { | ||
| String file = getConfigurationFile(url, urlPrefix, TYPE_PREFIX); | ||
| try ( | ||
| InputStream stream = getResourceAsStream(file); | ||
| BufferedReader reader = new BufferedReader(new InputStreamReader(stream, StandardCharsets.UTF_8))) { | ||
| StringBuilder builder = new StringBuilder(); | ||
| String line; | ||
| while (null != (line = reader.readLine())) { | ||
| if (!line.startsWith("#")) { | ||
| line = replaceEnvironmentVariables(line); | ||
| builder.append(line).append('\n'); | ||
| } | ||
| } | ||
| return builder.toString().getBytes(StandardCharsets.UTF_8); | ||
| } | ||
| } | ||
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| private String replaceEnvironmentVariables(final String line) { | ||
| Matcher matcher = PATTERN.matcher(line); | ||
| if (matcher.find()) { | ||
| StringBuffer modifiedLine = new StringBuffer(); | ||
| String[] envNameAndDefaultValue = matcher.group(1).split(KEY_VALUE_SEPARATOR, 2); | ||
| String envName = envNameAndDefaultValue[0]; | ||
| String envValue = getEnvironmentVariables(envName); | ||
| if (Strings.isNullOrEmpty(envValue) && envNameAndDefaultValue[1].isEmpty()) { | ||
| matcher.appendReplacement(modifiedLine, ""); | ||
| return modifiedLine.substring(0, modifiedLine.length() - 1); | ||
| } | ||
| if (Strings.isNullOrEmpty(envValue)) { | ||
| envValue = envNameAndDefaultValue[1]; | ||
| } | ||
| matcher.appendReplacement(modifiedLine, envValue); | ||
| return modifiedLine.toString(); | ||
| } | ||
| return line; | ||
| } | ||
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| /** | ||
| * This method is only used for mocking environment variables in unit tests and should not be used under any circumstances. | ||
| * | ||
| * @param name the name of the environment variable | ||
| * @return the string value of the variable, or null if the variable is not defined in the system environment | ||
| */ | ||
| String getEnvironmentVariables(final String name) { | ||
| return System.getenv(name); | ||
| } | ||
| } |
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41 changes: 41 additions & 0 deletions
41
...sphere/driver/jdbc/core/driver/spi/classpath/ClasspathWithEnvironmentURLProviderTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| */ | ||
|
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| package org.apache.shardingsphere.driver.jdbc.core.driver.spi.classpath; | ||
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| import org.apache.shardingsphere.driver.jdbc.core.driver.ShardingSphereURLManager; | ||
| import org.junit.jupiter.api.Test; | ||
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| import static org.hamcrest.CoreMatchers.is; | ||
| import static org.hamcrest.MatcherAssert.assertThat; | ||
| import static org.mockito.Mockito.spy; | ||
| import static org.mockito.Mockito.when; | ||
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| public class ClasspathWithEnvironmentURLProviderTest { | ||
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| @Test | ||
| void assertReplaceEnvironmentVariables() { | ||
| final String urlPrefix = "jdbc:shardingsphere:"; | ||
| ClasspathWithEnvironmentURLProvider spy = spy(new ClasspathWithEnvironmentURLProvider()); | ||
| when(spy.getEnvironmentVariables("FIXTURE_JDBC_URL")).thenReturn("jdbc:h2:mem:foo_ds_1;DB_CLOSE_DELAY=-1;DATABASE_TO_UPPER=false;MODE=MySQL"); | ||
| when(spy.getEnvironmentVariables("FIXTURE_USERNAME")).thenReturn("sa"); | ||
| byte[] actual = spy.getContent("jdbc:shardingsphere:classpath-environment:config/driver/foo-driver-environment-variables-fixture.yaml", urlPrefix); | ||
| byte[] actualOrigin = ShardingSphereURLManager.getContent("jdbc:shardingsphere:classpath:config/driver/foo-driver-fixture.yaml", urlPrefix); | ||
| assertThat(actual.length, is(999)); | ||
| assertThat(actual, is(actualOrigin)); | ||
| } | ||
| } |
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