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[ARTEMIS-2626]: Postgresql Journal implementation requires direct acc…
…ess to PostgeSQL driver internal classes. Issue: The BLOB manipulation is done using PostgreSQL internal classes starting from PGConnection. This leads to ClasCastExceptions if the connection is wrapped in a pool or if the driver is in a different classloader (WildFly). Fix: unwrap the connection and if the PostgreSQL classes are not directly available uses reflection to manipulate the BLOBs. Jira: https://issues.apache.org/jira/browse/ARTEMIS-2626
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...src/main/java/org/apache/activemq/artemis/jdbc/store/file/PostgresLargeObjectManager.java
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| /* | ||
| * Copyright 2019 The Apache Software Foundation. | ||
| * | ||
| * 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 org.apache.activemq.artemis.jdbc.store.file; | ||
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|
||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
| import java.sql.Connection; | ||
| import java.sql.SQLException; | ||
| import org.postgresql.PGConnection; | ||
| import org.postgresql.largeobject.LargeObject; | ||
|
|
||
| /** | ||
| * Helper class for when the postresql driver is not directly availalbe. | ||
| */ | ||
| public class PostgresLargeObjectManager { | ||
|
|
||
| /** | ||
| * This mode indicates we want to write to an object | ||
| */ | ||
| public static final int WRITE = 0x00020000; | ||
|
|
||
| /** | ||
| * This mode indicates we want to read an object | ||
| */ | ||
| public static final int READ = 0x00040000; | ||
|
|
||
| /** | ||
| * This mode is the default. It indicates we want read and write access to | ||
| * a large object | ||
| */ | ||
| public static final int READWRITE = READ | WRITE; | ||
|
|
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| private final Connection realConnection; | ||
| private boolean shouldUseReflection; | ||
|
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| public PostgresLargeObjectManager(Connection connection) throws SQLException { | ||
| this.realConnection = unwrap(connection); | ||
| try { | ||
| this.getClass().getClassLoader().loadClass("org.postgresql.PGConnection"); | ||
| shouldUseReflection = false; | ||
| } catch (ClassNotFoundException ex) { | ||
| shouldUseReflection = true; | ||
| } | ||
| } | ||
|
|
||
| public final Long createLO() throws SQLException { | ||
| if (shouldUseReflection) { | ||
| Object largeObjectManager = getLargeObjectManager(); | ||
| try { | ||
| Method method = largeObjectManager.getClass().getMethod("createLO"); | ||
| return (Long) method.invoke(largeObjectManager); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObjectManager", ex); | ||
| } | ||
| } else { | ||
| return ((PGConnection) realConnection).getLargeObjectAPI().createLO(); | ||
| } | ||
| } | ||
|
|
||
| public Object open(long oid, int mode) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| Object largeObjectManager = getLargeObjectManager(); | ||
| try { | ||
| Method method = largeObjectManager.getClass().getMethod("open", long.class, int.class); | ||
| return method.invoke(largeObjectManager, oid, mode); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObjectManager", ex); | ||
| } | ||
| } else { | ||
| return ((PGConnection) realConnection).getLargeObjectAPI().open(oid, mode); | ||
| } | ||
| } | ||
|
|
||
| public int size(Object largeObject) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("size"); | ||
| return (int) method.invoke(largeObject); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| return ((LargeObject) largeObject).size(); | ||
| } | ||
| } | ||
|
|
||
| public void close(Object largeObject) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("close"); | ||
| method.invoke(largeObject); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| ((LargeObject) largeObject).close(); | ||
| } | ||
| } | ||
|
|
||
| public byte[] read(Object largeObject, int length) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("read", int.class); | ||
| return (byte[]) method.invoke(largeObject, length); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| return ((LargeObject) largeObject).read(length); | ||
| } | ||
| } | ||
|
|
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| public void write(Object largeObject, byte[] data) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("write", byte[].class); | ||
| method.invoke(largeObject, data); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| ((LargeObject) largeObject).write(data); | ||
| } | ||
| } | ||
|
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| public void seek(Object largeObject, int position) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("seek", Integer.class); | ||
| method.invoke(largeObject, position); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| ((LargeObject) largeObject).seek(position); | ||
| } | ||
| } | ||
|
|
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| public void truncate(Object largeObject, int position) throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = largeObject.getClass().getMethod("truncate", Integer.class); | ||
| method.invoke(largeObject, position); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObject", ex); | ||
| } | ||
| } else { | ||
| ((LargeObject) largeObject).truncate(position); | ||
| } | ||
| } | ||
|
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| private Object getLargeObjectManager() throws SQLException { | ||
| if (shouldUseReflection) { | ||
| try { | ||
| Method method = realConnection.getClass().getMethod("getLargeObjectAPI"); | ||
| return method.invoke(realConnection); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| throw new SQLException("Couldn't access org.postgresql.largeobject.LargeObjectManager", ex); | ||
| } | ||
| } else { | ||
| return ((PGConnection) realConnection).getLargeObjectAPI(); | ||
| } | ||
| } | ||
|
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| public final Connection unwrap(Connection connection) throws SQLException { | ||
| Connection conn = connection.unwrap(Connection.class); | ||
| return unwrapIronJacamar(unwrapDbcp(unwrapSpring(conn))); | ||
| } | ||
|
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| private Connection unwrapIronJacamar(Connection conn) { | ||
| try { | ||
| Method method = conn.getClass().getMethod("getUnderlyingConnection"); | ||
| return (Connection) method.invoke(conn); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| return conn; | ||
| } | ||
| } | ||
|
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| private Connection unwrapDbcp(Connection conn) { | ||
| try { | ||
| Method method = conn.getClass().getMethod("getDelegate"); | ||
| return (Connection) method.invoke(conn); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| return conn; | ||
| } | ||
| } | ||
|
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| private Connection unwrapSpring(Connection conn) { | ||
| try { | ||
| Method method = conn.getClass().getMethod("getTargetConnection"); | ||
| return (Connection) method.invoke(conn); | ||
| } catch (NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException | InvocationTargetException ex) { | ||
| return conn; | ||
| } | ||
| } | ||
| } |
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