| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivetranse.transaction.ibatis; |
| 16 | |
| 17 | import java.io.IOException; |
| 18 | import java.io.InputStreamReader; |
| 19 | import java.lang.reflect.InvocationHandler; |
| 20 | import java.lang.reflect.InvocationTargetException; |
| 21 | import java.lang.reflect.Method; |
| 22 | import java.lang.reflect.Proxy; |
| 23 | import java.sql.Connection; |
| 24 | |
| 25 | import org.apache.commons.logging.Log; |
| 26 | import org.apache.hivemind.ApplicationRuntimeException; |
| 27 | import org.apache.hivemind.Resource; |
| 28 | import org.apache.hivemind.ServiceImplementationFactory; |
| 29 | import org.apache.hivemind.ServiceImplementationFactoryParameters; |
| 30 | import org.apache.hivemind.util.ToStringBuilder; |
| 31 | |
| 32 | import com.ibatis.sqlmap.client.SqlMapClient; |
| 33 | import com.ibatis.sqlmap.client.SqlMapClientBuilder; |
| 34 | |
| 35 | /** |
| 36 | * This service creates Proxys to iBATIS SqlMapClient (V2). |
| 37 | * <p> |
| 38 | * <b>ServiceModel must be singleton</b> |
| 39 | * |
| 40 | * @author Jean-Francois Poilpret |
| 41 | */ |
| 42 | public class SqlMapClientFactory implements ServiceImplementationFactory |
| 43 | { |
| 44 | public Object createCoreServiceImplementation( |
| 45 | ServiceImplementationFactoryParameters factoryParams) |
| 46 | { |
| 47 | Log logger = factoryParams.getLog(); |
| 48 | String serviceId = factoryParams.getServiceId(); |
| 49 | Class serviceInterface = factoryParams.getServiceInterface(); |
| 50 | |
| 51 | // Make sure that serviceInterface == SqlMapClient |
| 52 | // (this factory is dedicated exclusively to iBATIS SqlMapClients) |
| 53 | if (!SqlMapClient.class.equals(serviceInterface)) |
| 54 | { |
| 55 | // throw error |
| 56 | logger.error("SqlMapClientFactory can only build SqlMapClient services."); |
| 57 | throw new ApplicationRuntimeException("Bad interface"); |
| 58 | } |
| 59 | |
| 60 | // Read parameter |
| 61 | SqlMapClientFactoryContribution contrib = |
| 62 | (SqlMapClientFactoryContribution) factoryParams.getFirstParameter(); |
| 63 | SqlMapClient client = buildSqlMapClient(logger, contrib.getConfig()); |
| 64 | |
| 65 | return Proxy.newProxyInstance( |
| 66 | factoryParams.getInvokingModule().getClassResolver().getClassLoader(), |
| 67 | new Class[] {serviceInterface}, |
| 68 | new SqlMapClientProxy(logger, serviceId, contrib.getConnection(), client)); |
| 69 | } |
| 70 | |
| 71 | protected SqlMapClient buildSqlMapClient(Log logger, Resource config) |
| 72 | { |
| 73 | java.net.URL url = config.getResourceURL(); |
| 74 | if (url == null) |
| 75 | { |
| 76 | logger.error("Cannot open " + config.getName()); |
| 77 | throw new ApplicationRuntimeException("Bad configuration file"); |
| 78 | } |
| 79 | InputStreamReader input; |
| 80 | try |
| 81 | { |
| 82 | input = new InputStreamReader(url.openStream()); |
| 83 | } |
| 84 | catch (IOException e) |
| 85 | { |
| 86 | logger.error("buildSqlMapClient", e); |
| 87 | throw new ApplicationRuntimeException("buildSqlMapClient", e); |
| 88 | } |
| 89 | |
| 90 | SqlMapClient client = SqlMapClientBuilder.buildSqlMapClient(input); |
| 91 | |
| 92 | return client; |
| 93 | } |
| 94 | |
| 95 | static private class SqlMapClientProxy implements InvocationHandler |
| 96 | { |
| 97 | public SqlMapClientProxy( Log logger, |
| 98 | String serviceId, |
| 99 | Connection connection, |
| 100 | SqlMapClient client) |
| 101 | { |
| 102 | _logger = logger; |
| 103 | _serviceId = serviceId; |
| 104 | _connection = connection; |
| 105 | _client = client; |
| 106 | } |
| 107 | |
| 108 | //CSOFF: IllegalThrowsCheck |
| 109 | public Object invoke(Object proxy, Method method, Object[] args) |
| 110 | throws Throwable |
| 111 | { |
| 112 | if ("toString".equals(method.getName())) |
| 113 | { |
| 114 | ToStringBuilder builder = new ToStringBuilder(this); |
| 115 | builder.append("serviceId", _serviceId); |
| 116 | return builder.toString(); |
| 117 | } |
| 118 | |
| 119 | // Set the user Connection (the reference is always the same, but |
| 120 | // the actual Connection can change in fact). We call this method to |
| 121 | // make sure the SqlMapClient is aware of it) |
| 122 | _client.setUserConnection(_connection); |
| 123 | |
| 124 | try |
| 125 | { |
| 126 | return method.invoke(_client, args); |
| 127 | } |
| 128 | catch (IllegalAccessException e) |
| 129 | { |
| 130 | // Can never happen (normally!) |
| 131 | _logger.fatal("Unexpected", e); |
| 132 | throw e; |
| 133 | } |
| 134 | catch (InvocationTargetException e) |
| 135 | { |
| 136 | throw e.getTargetException(); |
| 137 | } |
| 138 | } |
| 139 | //CSON: IllegalThrowsCheck |
| 140 | |
| 141 | private final Log _logger; |
| 142 | private final String _serviceId; |
| 143 | private final Connection _connection; |
| 144 | private final SqlMapClient _client; |
| 145 | } |
| 146 | } |