1 | package gov.va.med.edp.vistalink;
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2 |
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3 | import gov.va.med.exception.FoundationsException;
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4 | import gov.va.med.vistalink.adapter.cci.VistaLinkAppProxyConnectionSpec;
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5 | import gov.va.med.vistalink.adapter.cci.VistaLinkConnection;
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6 | import gov.va.med.vistalink.adapter.cci.VistaLinkConnectionSpec;
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7 | import gov.va.med.vistalink.adapter.cci.VistaLinkDuzConnectionSpec;
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8 | import gov.va.med.vistalink.adapter.record.LoginsDisabledFaultException;
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9 | import gov.va.med.vistalink.adapter.record.VistaLinkFaultException;
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10 | import gov.va.med.vistalink.adapter.spi.VistaLinkServerInfo;
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11 | import gov.va.med.vistalink.rpc.*;
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12 | import gov.va.med.vistalink.security.m.SecurityFaultException;
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13 | import org.springframework.dao.*;
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14 | import org.springframework.jca.cci.core.CciTemplate;
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15 | import org.springframework.jca.cci.core.ConnectionCallback;
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16 | import org.springframework.util.Assert;
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17 | import org.slf4j.LoggerFactory;
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18 | import org.slf4j.Logger;
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19 |
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20 | import javax.resource.ResourceException;
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21 | import javax.resource.cci.Connection;
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22 | import javax.resource.cci.ConnectionFactory;
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23 | import javax.resource.cci.ConnectionSpec;
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24 | import java.sql.SQLException;
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25 | import java.text.MessageFormat;
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26 | import java.util.List;
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27 |
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28 | /**
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29 | * This is the central class in the rpc package. It simplifies the use of VistaLink RPCs and helps to avoid common errors.
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30 | * It executes core RPC workflow, leaving application code to provide RPC names and parameters and extract results. This
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31 | * class executes RPCs with VistaLink, initiating iteration over RPC results and catching VistaLink exceptions and
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32 | * translating them to the generic data access exception hierarchy defined in the org.springframework.dao package.
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33 | */
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34 | public class VistaLinkTemplate {
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35 |
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36 | public static final int USER_TYPE_DUZ = 1;
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37 | public static final int USER_TYPE_APPLICATION_PROXY = 2;
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38 |
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39 | static final int DEFAULT_TIMEOUT = 10000;
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40 |
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41 | private static Logger log = LoggerFactory.getLogger(VistaLinkTemplate.class);
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42 |
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43 | private int timeOut = DEFAULT_TIMEOUT;
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44 | private ConnectionFactoryLocator connectionFactoryLocator;
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45 | private static final String UNABLE_TO_EXECUTE_RPC = "Unable to execute RPC";
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46 |
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47 | public VistaLinkTemplate(ConnectionFactoryLocator connectionFactoryLocator) {
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48 | this.connectionFactoryLocator = connectionFactoryLocator;
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49 | }
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50 |
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51 | public String rpcAsUser(final String division, final String duz, final String rpcContext, final String rpcName) throws DataAccessException {
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52 | return rpcAsUser(division, duz, rpcContext, rpcName, (List) null);
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53 | }
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54 |
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55 | // TODO: Uncomment me on java 5
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56 | // public String rpcAsUser(final String division, final String duz, final String rpcContext, final String rpcName, Object... params) throws DataAccessException {
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57 | // return rpcAsUser(division, duz, rpcContext, rpcName, createParameterList(params));
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58 | // }
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59 |
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60 | public String rpcAsUser(final String division, final String duz, final String rpcContext, final String rpcName, final List params) throws DataAccessException {
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61 | return rpc(new VistaLinkDuzConnectionSpec(division, duz), division, duz, rpcContext, rpcName, params);
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62 | }
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63 |
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64 | public String rpcAsApplication(final String division, final String applicationProxyName, final String rpcContext, final String rpcName) throws DataAccessException {
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65 | return rpcAsApplication(division, applicationProxyName, rpcContext, rpcName, (List) null);
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66 | }
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67 |
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68 | // TODO: Uncomment me on java 5
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69 | // public String rpcAsApplication(final String division, final String applicationProxyName, final String rpcContext, final String rpcName, Object... params) throws DataAccessException {
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70 | // return rpcAsApplication(division, applicationProxyName, rpcContext, rpcName, createParameterList(params));
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71 | // }
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72 |
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73 | public String rpcAsApplication(final String division, final String applicationProxyName, final String rpcContext, final String rpcName, final List params) throws DataAccessException {
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74 | return rpc(new VistaLinkAppProxyConnectionSpec(division, applicationProxyName), division, applicationProxyName, rpcContext, rpcName, params);
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75 | }
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76 |
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77 | public String rpc(ConnectionSpec connectionSpec, final String division, final String user, final String rpcContext, final String rpcName, final List params) throws DataAccessException {
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78 | if (log.isDebugEnabled())
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79 | log.debug(MessageFormat.format("''{0}'' called in context ''{1}'' by ''{2}'' at facility ''{3}'' with params: {4}", new Object[]{rpcName, rpcContext, user, division, params}));
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80 |
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81 | ConnectionFactory connectionFactory = connectionFactoryLocator.getConnectionFactory(division);
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82 | try {
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83 | CciTemplate t = new CciTemplate(connectionFactory, connectionSpec);
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84 | RpcResponse response = (RpcResponse) t.execute(new ConnectionCallback() {
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85 | public Object doInConnection(Connection connection, ConnectionFactory connectionFactory) throws ResourceException, SQLException, DataAccessException {
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86 | try {
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87 | Assert.isInstanceOf(VistaLinkConnection.class, connection);
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88 | VistaLinkConnection conn = (VistaLinkConnection) connection;
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89 | conn.setTimeOut(getTimeOut());
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90 |
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91 | RpcRequest request = RpcRequestFactory.getRpcRequest(rpcContext, rpcName);
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92 | request.setUseProprietaryMessageFormat(true);
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93 | request.setXmlResponse(false);
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94 |
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95 | if (params != null) {
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96 | request.setParams(params);
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97 | }
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98 |
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99 | return conn.executeRPC(request);
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100 | } catch (IllegalArgumentException e) {
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101 | throw new InvalidDataAccessApiUsageException(UNABLE_TO_EXECUTE_RPC, e);
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102 | } catch (NoRpcContextFaultException e) {
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103 | throw new VistaLinkNoRpcContextException(e);
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104 | } catch (RpcNotOkForProxyUseException e) {
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105 | throw new VistaLinkRpcNotOkForProxyUseException(e);
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106 | } catch (RpcNotInContextFaultException e) {
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107 | throw new VistaLinkRpcNotInContextException(e);
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108 | } catch (LoginsDisabledFaultException e) {
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109 | throw new VistaLinkLoginsDisabledException(e);
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110 | } catch (SecurityFaultException e) {
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111 | throw new VistaLinkPermissionDeniedException(e);
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112 | } catch (VistaLinkFaultException e) {
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113 | throw new VistaLinkDataRetrievalFailureException(e);
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114 | } catch (FoundationsException e) {
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115 | throw new DataRetrievalFailureException(UNABLE_TO_EXECUTE_RPC, e);
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116 | }
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117 | }
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118 | });
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119 | String result = response.getResults();
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120 | if (log.isDebugEnabled()) {
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121 | log.debug(MessageFormat.format("''{0}'' returned: {1}", new Object[]{rpcName, result}));
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122 | }
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123 | return result;
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124 | } catch (IllegalArgumentException e) {
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125 | throw new InvalidDataAccessApiUsageException(UNABLE_TO_EXECUTE_RPC, e);
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126 | }
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127 | }
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128 |
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129 | public int getTimeOut() {
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130 | return timeOut;
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131 | }
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132 |
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133 | public void setTimeOut(int timeOut) {
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134 | this.timeOut = timeOut;
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135 | }
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136 |
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137 | public ConnectionFactoryLocator getConnectionFactoryLocator() {
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138 | return connectionFactoryLocator;
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139 | }
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140 |
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141 | // TODO: Uncomment me for java 5
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142 | // private List createParameterList(Object... params) {
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143 | // List paramList = new ArrayList();
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144 | // for (Object param : params) {
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145 | // paramList.add(param);
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146 | // }
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147 | // return paramList;
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148 | // }
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149 |
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150 | public VistaLinkServerInfo getConnectionInfo(final String division, final String user, final int userType) throws DataAccessException {
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151 | VistaLinkConnection conn = null;
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152 | ConnectionFactory connectionFactory = connectionFactoryLocator.getConnectionFactory(division);
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153 | try {
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154 | conn = (VistaLinkConnection) connectionFactory.getConnection(createConnectionSpec(division, user, userType));
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155 | } catch (ResourceException e) {
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156 | throw new DataAccessResourceFailureException("error getting connection info", e);
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157 | }
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158 | VistaLinkServerInfo vistaLinkServerInfo = conn.getConnectionInfo();
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159 | return vistaLinkServerInfo;
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160 | }
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161 |
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162 | private VistaLinkConnectionSpec createConnectionSpec(String division, String user, int userType) {
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163 | switch (userType) {
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164 | case USER_TYPE_APPLICATION_PROXY:
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165 | return new VistaLinkAppProxyConnectionSpec(division, user);
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166 | case USER_TYPE_DUZ:
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167 | default:
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168 | return new VistaLinkDuzConnectionSpec(division, user);
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169 | }
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170 | }
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171 | }
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