*/
package mir.storage;
+import java.io.ByteArrayInputStream;
import java.io.IOException;
+import java.io.InputStream;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;
-import java.util.Vector;
import mir.config.MirPropertiesConfiguration;
-import mir.config.MirPropertiesConfiguration.PropertiesConfigExc;
+import mir.entity.AbstractEntity;
import mir.entity.Entity;
import mir.entity.EntityList;
import mir.entity.StorableObjectEntity;
import mir.storage.store.StoreIdentifier;
import mir.storage.store.StoreUtil;
import mir.util.JDBCStringRoutines;
+import mircoders.global.MirGlobal;
-import com.codestudio.util.SQLManager;
-
+import org.apache.commons.dbcp.DelegatingConnection;
+import org.postgresql.PGConnection;
+import org.postgresql.largeobject.LargeObject;
+import org.postgresql.largeobject.LargeObjectManager;
/**
- * Diese Klasse implementiert die Zugriffsschicht auf die Datenbank.
- * Alle Projektspezifischen Datenbankklassen erben von dieser Klasse.
- * In den Unterklassen wird im Minimalfall nur die Tabelle angegeben.
- * Im Konfigurationsfile findet sich eine Verweis auf den verwendeten
- * Treiber, Host, User und Passwort, ueber den der Zugriff auf die
- * Datenbank erfolgt.
+ * Implements database access.
*
- * @version $Id: Database.java,v 1.44.2.22 2004/02/08 21:05:01 zapata Exp $
+ * @version $Id: Database.java,v 1.44.2.27 2005/02/10 16:22:33 rhindes Exp $
* @author rk
*
*/
-public class Database implements StorageObject {
+public class Database {
private static Class GENERIC_ENTITY_CLASS = mir.entity.StorableObjectEntity.class;
protected static final ObjectStore o_store = ObjectStore.getInstance();
private static final int _millisPerHour = 60 * 60 * 1000;
protected LoggerWrapper logger;
+
protected MirPropertiesConfiguration configuration;
protected String mainTable;
protected String primaryKeySequence = null;
protected String primaryKeyField = "id";
- protected boolean evaluatedMetaData = false;
- protected ArrayList metadataFields;
- protected ArrayList metadataLabels;
- protected ArrayList metadataNotNullFields;
- protected int[] metadataTypes;
- protected Class theEntityClass;
- protected boolean hasTimestamp = true;
+ protected List fieldNames;
+ protected int[] fieldTypes;
+ protected Map fieldNameToType;
+
+ protected Class entityClass;
private int defaultLimit;
TimeZone timezone;
* erzeugt.
*/
public Database() throws StorageObjectFailure {
- try {
- configuration = MirPropertiesConfiguration.instance();
- }
- catch (PropertiesConfigExc e) {
- throw new StorageObjectFailure(e);
- }
+ configuration = MirPropertiesConfiguration.instance();
logger = new LoggerWrapper("Database");
timezone = TimeZone.getTimeZone(configuration.getString("Mir.DefaultTimezone"));
internalDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
defaultLimit = Integer.parseInt(configuration.getString("Database.Limit"));
try {
- theEntityClass = GENERIC_ENTITY_CLASS;
+ entityClass = GENERIC_ENTITY_CLASS;
}
catch (Throwable e) {
logger.error("Error in Database() constructor with " + theAdaptorName + " -- " + e.getMessage());
}
}
- /**
- * Liefert die Entity-Klasse zur?ck, in der eine Datenbankzeile gewrappt
- * wird. Wird die Entity-Klasse durch die erbende Klasse nicht ?berschrieben,
- * wird eine mir.entity.GenericEntity erzeugt.
- *
- * @return Class-Objekt der Entity
- */
public java.lang.Class getEntityClass() {
- return theEntityClass;
+ return entityClass;
+ }
+
+ public Entity createNewEntity() throws StorageObjectFailure {
+ try {
+ AbstractEntity result = (AbstractEntity) entityClass.newInstance();
+ result.setStorage(this);
+
+ return result;
+ }
+ catch (Throwable t) {
+ throw new StorageObjectFailure(t);
+ }
}
/**
return defaultLimit;
}
- /**
- * Liefert den Namen des Primary-Keys zur?ck. Wird die Variable nicht von
- * der erbenden Klasse ?berschrieben, so ist der Wert <code>PKEY</code>
- * @return Name des Primary-Keys
- */
- public String getIdName() {
+ public String getIdFieldName() {
return primaryKeyField;
}
}
/**
- * Liefert Feldtypen der Felder der Tabelle zurueck (s.a. java.sql.Types)
- * @return int-Array mit den Typen der Felder
- * @exception StorageObjectFailure
- */
- public int[] getTypes() throws StorageObjectFailure {
- if (metadataTypes == null) {
- get_meta_data();
- }
-
- return metadataTypes;
- }
-
- /**
- * Liefert eine Liste der Labels der Tabellenfelder
- */
- public List getLabels() throws StorageObjectFailure {
- if (metadataLabels == null) {
- get_meta_data();
- }
-
- return metadataLabels;
- }
-
- /**
- * Liefert eine Liste der Felder der Tabelle
- * @return ArrayList mit Feldern
+ * Returns a list of field names for this <code>Database</code>
*/
- public List getFields() throws StorageObjectFailure {
- if (metadataFields == null) {
- get_meta_data();
+ public List getFieldNames() throws StorageObjectFailure {
+ if (fieldNames == null) {
+ acquireMetaData();
}
- return metadataFields;
+ return fieldNames;
}
/**
}
// ask object store for object
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
+ if (StoreUtil.extendsStorableEntity(entityClass)) {
String uniqueId = id;
- if (theEntityClass.equals(StorableObjectEntity.class)) {
+ if (entityClass.equals(StorableObjectEntity.class)) {
uniqueId += ("@" + mainTable);
}
- StoreIdentifier search_sid = new StoreIdentifier(theEntityClass, uniqueId);
+ StoreIdentifier search_sid = new StoreIdentifier(entityClass, uniqueId);
logger.debug("CACHE: (dbg) looking for sid " + search_sid.toString());
Entity hit = (Entity) o_store.use(search_sid);
}
Statement stmt = null;
- Connection con = getPooledCon();
+ Connection con = obtainConnection();
Entity returnEntity = null;
try {
rs = executeSql(stmt, selectSql);
if (rs != null) {
- if (evaluatedMetaData == false) {
- evalMetaData(rs.getMetaData());
- }
-
if (rs.next()) {
returnEntity = makeEntityFromResultSet(rs);
}
return selectByWhereClause( mainTablePrefix, extraTables, aWhereClause, "", 0, defaultLimit);
}
- /**
- * select-Operator um Datensaetze zu bekommen, die key = value erfuellen.
- * @param aField Datenbankfeld der Bedingung.
- * @param aValue Wert die der key anehmen muss.
- * @return EntityList mit den gematchten Entities
- */
public EntityList selectByFieldValue(String aField, String aValue) throws StorageObjectFailure {
return selectByFieldValue(aField, aValue, 0);
}
- /**
- * select-Operator um Datensaetze zu bekommen, die key = value erfuellen.
- * @param aField Datenbankfeld der Bedingung.
- * @param aValue Wert die der key anehmen muss.
- * @param offset Gibt an ab welchem Datensatz angezeigt werden soll.
- * @return EntityList mit den gematchten Entities
- */
public EntityList selectByFieldValue(String aField, String aValue, int offset) throws StorageObjectFailure {
- return selectByWhereClause(aField + "=" + aValue, offset);
+ return selectByWhereClause(aField + "='" + JDBCStringRoutines.escapeStringLiteral(aValue)+"'", offset);
}
/**
* select-Operator returns EntityList with matching rows in Database.
* @param aWhereClause where-Clause
* @param anOrderByClause orderBy-Clause
- * @param offset ab welchem Datensatz
- * @param limit wieviele Datens?tze
+ * @param anOffset ab welchem Datensatz
+ * @param aLimit wieviele Datens?tze
* @return EntityList mit den gematchten Entities
* @exception StorageObjectFailure
*/
- public EntityList selectByWhereClause(String mainTablePrefix, List extraTables,
+ public EntityList selectByWhereClause(
+ String aMainTablePrefix, List anExtraTables,
String aWhereClause, String anOrderByClause,
- int offset, int limit) throws StorageObjectFailure {
+ int anOffset, int aLimit) throws StorageObjectFailure {
- // TODO get rid of emtpy Strings in extraTables
- // make extraTables null, if single empty String in it
+ // TODO get rid of emtpy Strings in anExtraTables
+ // make anExtraTables null, if single empty String in it
// cause StringUtil.splitString puts in emptyString
- if (extraTables != null && ((String)extraTables.get(0)).trim().equals(""))
- {
- logger.debug("+++ made extraTables to null!");
- extraTables=null;
- }
- String useTable = mainTable;
- String selectStar = "*";
- if (mainTablePrefix!=null && mainTablePrefix.trim().length()>0) {
- useTable+=" "+mainTablePrefix;
- selectStar=mainTablePrefix.trim() + ".*";
- }
+ if (anExtraTables!=null && ((String) anExtraTables.get(0)).trim().equals("")){
+ anExtraTables=null;
+ }
+
+ String useTable = mainTable;
+ String selection = "*";
+
+ if (aMainTablePrefix != null && aMainTablePrefix.trim().length() > 0) {
+ useTable += " " + aMainTablePrefix;
+ selection = aMainTablePrefix.trim() + ".*";
+ }
// check o_store for entitylist
// only if no relational select
- if (extraTables==null) {
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
- StoreIdentifier searchSid = new StoreIdentifier(theEntityClass,
+ if (anExtraTables==null) {
+ if (StoreUtil.extendsStorableEntity(entityClass)) {
+ StoreIdentifier searchSid = new StoreIdentifier(entityClass,
StoreContainerType.STOC_TYPE_ENTITYLIST,
StoreUtil.getEntityListUniqueIdentifierFor(mainTable,
- aWhereClause, anOrderByClause, offset, limit));
+ aWhereClause, anOrderByClause, anOffset, aLimit));
EntityList hit = (EntityList) o_store.use(searchSid);
if (hit != null) {
// local
EntityList theReturnList = null;
- Connection con = null;
- Statement stmt = null;
- ResultSet rs;
- int offsetCount = 0;
- int count = 0;
+ Connection connection = null;
+ Statement statement = null;
+ ResultSet resultSet;
// build sql-statement
aWhereClause = null;
}
- StringBuffer countSql =
- new StringBuffer("select count(*) from ").append(useTable);
StringBuffer selectSql =
- new StringBuffer("select "+selectStar+" from ").append(useTable);
+ new StringBuffer("select "+selection+" from ").append(useTable);
// append extratables, if necessary
- if (extraTables!=null) {
- for (int i=0;i < extraTables.size();i++) {
- if (!extraTables.get(i).equals("")) {
- countSql.append( ", " + extraTables.get(i));
- selectSql.append( ", " + extraTables.get(i));
+ if (anExtraTables!=null) {
+ for (int i=0;i < anExtraTables.size();i++) {
+ if (!anExtraTables.get(i).equals("")) {
+ selectSql.append( ", " + anExtraTables.get(i));
}
}
}
if (aWhereClause != null) {
selectSql.append(" where ").append(aWhereClause);
- countSql.append(" where ").append(aWhereClause);
}
if ((anOrderByClause != null) && !(anOrderByClause.trim().length() == 0)) {
selectSql.append(" order by ").append(anOrderByClause);
}
- if ((limit > -1) && (offset > -1)) {
- selectSql.append(" LIMIT ").append(limit).append(" OFFSET ").append(offset);
+ if ((aLimit > -1) && (anOffset > -1)) {
+ selectSql.append(" LIMIT ").append(aLimit+1).append(" OFFSET ").append(anOffset);
}
// execute sql
try {
- con = getPooledCon();
- stmt = con.createStatement();
+ connection = obtainConnection();
+ statement = connection.createStatement();
+ boolean hasMore = false;
// selecting...
- rs = executeSql(stmt, selectSql.toString());
-
- if (rs != null) {
- if (!evaluatedMetaData) {
- evalMetaData(rs.getMetaData());
- }
+ resultSet = executeSql(statement, selectSql.toString());
+ if (resultSet != null) {
theReturnList = new EntityList();
Entity theResultEntity;
- while (rs.next()) {
- theResultEntity = makeEntityFromResultSet(rs);
+ int position = 0;
+ while (((aLimit == -1) || (position<aLimit)) && resultSet.next()) {
+ theResultEntity = makeEntityFromResultSet(resultSet);
theReturnList.add(theResultEntity);
- offsetCount++;
+ position++;
}
- rs.close();
+ hasMore = resultSet.next();
+ resultSet.close();
}
- // making entitylist infos
- count = offsetCount;
-
if (theReturnList != null) {
// now we decide if we have to know an overall count...
- count = offsetCount;
-
- if ((limit > -1) && (offset > -1)) {
- if (offsetCount == limit) {
- rs = executeSql(stmt, countSql.toString());
-
- if (rs != null) {
- if (rs.next()) {
- count = rs.getInt(1);
- }
-
- rs.close();
- }
- else {
- logger.error("Could not count: " + countSql);
- }
- }
- }
-
- theReturnList.setCount(count);
- theReturnList.setOffset(offset);
+ theReturnList.setOffset(anOffset);
theReturnList.setWhere(aWhereClause);
theReturnList.setOrder(anOrderByClause);
theReturnList.setStorage(this);
- theReturnList.setLimit(limit);
-
- if (offset >= limit) {
- theReturnList.setPrevBatch(offset - limit);
- }
+ theReturnList.setLimit(aLimit);
- if ((offset + offsetCount) < count) {
- theReturnList.setNextBatch(offset + limit);
+ if (hasMore) {
+ theReturnList.setNextBatch(anOffset + aLimit);
}
- if (extraTables==null && StoreUtil.extendsStorableEntity(theEntityClass)) {
+ if (anExtraTables==null && StoreUtil.extendsStorableEntity(entityClass)) {
StoreIdentifier sid = theReturnList.getStoreIdentifier();
logger.debug("CACHE (add): " + sid.toString());
o_store.add(sid);
}
finally {
try {
- if (con != null) {
- freeConnection(con, stmt);
+ if (connection != null) {
+ freeConnection(connection, statement);
}
} catch (Throwable t) {
}
return theReturnList;
}
- /**
- * Bastelt aus einer Zeile der Datenbank ein EntityObjekt.
- *
- * @param rs Das ResultSetObjekt.
- * @return Entity Die Entity.
- */
private Entity makeEntityFromResultSet(ResultSet rs)
throws StorageObjectFailure {
Map theResultHash = new HashMap();
String theResult = null;
- int theType;
+ int type;
Entity returnEntity = null;
try {
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
+ if (StoreUtil.extendsStorableEntity(entityClass)) {
StoreIdentifier searchSid = StorableObjectEntity.getStoreIdentifier(this,
- theEntityClass, rs);
+ entityClass, rs);
Entity hit = (Entity) o_store.use(searchSid);
if (hit != null) return hit;
}
-
- int size = metadataFields.size();
-
- for (int i = 0; i < size; i++) {
+ for (int i = 0; i < getFieldNames().size(); i++) {
// alle durchlaufen bis nix mehr da
- theType = metadataTypes[i];
+ type = fieldTypes[i];
- if (theType == java.sql.Types.LONGVARBINARY) {
+ if (type == java.sql.Types.LONGVARBINARY) {
InputStreamReader is =
(InputStreamReader) rs.getCharacterStream(i + 1);
is.close();
theResult = theResultString.toString();
- } else {
+ }
+ else {
theResult = null;
}
- } else {
- theResult = getValueAsString(rs, (i + 1), theType);
+ }
+ else {
+ theResult = getValueAsString(rs, (i + 1), type);
}
if (theResult != null) {
- theResultHash.put(metadataFields.get(i), theResult);
+ theResultHash.put(getFieldNames().get(i), theResult);
}
}
- if (theEntityClass != null) {
- returnEntity = (Entity) theEntityClass.newInstance();
- returnEntity.setStorage(this);
+ if (entityClass != null) {
+ returnEntity = createNewEntity();
returnEntity.setFieldValues(theResultHash);
if (returnEntity instanceof StorableObject) {
o_store.add(((StorableObject) returnEntity).getStoreIdentifier());
}
} else {
- throwStorageObjectException("Internal Error: theEntityClass not set!");
+ throwStorageObjectException("Internal Error: entityClass not set!");
}
}
- catch (IllegalAccessException e) {
- throwStorageObjectException("No access! -- " + e.getMessage());
- }
catch (IOException e) {
throwStorageObjectException("IOException! -- " + e.getMessage());
}
- catch (InstantiationException e) {
- throwStorageObjectException("No Instatiation! -- " + e.getMessage());
- }
catch (SQLException sqe) {
throwSQLException(sqe, "makeEntityFromResultSet");
/**
* Inserts an entity into the database.
*
- * @param theEntity
+ * @param anEntity
* @return der Wert des Primary-keys der eingef?gten Entity
*/
- public String insert(Entity theEntity) throws StorageObjectFailure {
- //cache
- invalidatePopupCache();
-
- // invalidating all EntityLists corresponding with theEntityClass
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
- StoreContainerType stoc_type =
- StoreContainerType.valueOf(theEntityClass,
- StoreContainerType.STOC_TYPE_ENTITYLIST);
- o_store.invalidate(stoc_type);
- }
+ public String insert(Entity anEntity) throws StorageObjectFailure {
+ invalidateStore();
String returnId = null;
Connection con = null;
boolean firstField = true;
// make sql-string
- for (int i = 0; i < getFields().size(); i++) {
- aField = (String) getFields().get(i);
+ for (int i = 0; i < getFieldNames().size(); i++) {
+ aField = (String) getFieldNames().get(i);
if (!aField.equals(primaryKeyField)) {
aValue = null;
// exceptions
- if (!theEntity.hasFieldValue(aField) && (
+ if (!anEntity.hasFieldValue(aField) && (
aField.equals("webdb_create") ||
aField.equals("webdb_lastchange"))) {
aValue = "NOW()";
}
else {
- if (theEntity.hasFieldValue(aField)) {
+ if (anEntity.hasFieldValue(aField)) {
aValue =
"'" +
- JDBCStringRoutines.escapeStringLiteral(theEntity.getFieldValue(aField)) + "'";
+ JDBCStringRoutines.escapeStringLiteral(anEntity.getFieldValue(aField)) + "'";
}
}
.append(") values (").append(v).append(")");
String sql = sqlBuf.toString();
- logger.info("INSERT: " + sql);
- con = getPooledCon();
+ logQueryBefore(sql);
+ con = obtainConnection();
con.setAutoCommit(false);
pstmt = con.prepareStatement(sql);
// pstmt = con.prepareStatement("select currval('" + + "_id_seq')");
returnId = getLatestInsertedId(con);
- theEntity.setId(returnId);
+ anEntity.setId(returnId);
}
catch (SQLException sqe) {
throwSQLException(sqe, "insert");
* that chooses to either insert or update depending if we
* have a primary key in the entity. i don't know if we
* still need the streamed input fields. // rk */
+
/** todo extension: check if Entity did change, otherwise we don't need
* the roundtrip to the database */
/** invalidating corresponding entitylists in o_store*/
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
- StoreContainerType stoc_type =
- StoreContainerType.valueOf(theEntityClass,
- StoreContainerType.STOC_TYPE_ENTITYLIST);
- o_store.invalidate(stoc_type);
- }
+
+ invalidateStore();
String id = theEntity.getId();
String aField;
StringBuffer fv = new StringBuffer();
boolean firstField = true;
- //cache
- invalidatePopupCache();
-
// build sql statement
- for (int i = 0; i < getFields().size(); i++) {
- aField = (String) metadataFields.get(i);
+ for (int i = 0; i < getFieldNames().size(); i++) {
+ aField = (String) getFieldNames().get(i);
// only normal cases
// todo if entity.hasFieldValue returns false, then the value should be stored as null
new StringBuffer("update ").append(mainTable).append(" set ").append(fv);
// exceptions
- if (metadataFields.contains("webdb_lastchange")) {
+ if (getFieldNames().contains("webdb_lastchange")) {
sql.append(",webdb_lastchange=NOW()");
}
// special case: the webdb_create requires the field in yyyy-mm-dd HH:mm
// format so anything extra will be ignored. -mh
- if (metadataFields.contains("webdb_create") &&
+ if (getFieldNames().contains("webdb_create") &&
theEntity.hasFieldValue("webdb_create")) {
// minimum of 10 (yyyy-mm-dd)...
if (theEntity.getFieldValue("webdb_create").length() >= 10) {
}
sql.append(" where id=").append(id);
- logger.info("UPDATE: " + sql);
+ logQueryBefore(sql.toString());
try {
- con = getPooledCon();
+ con = obtainConnection();
con.setAutoCommit(false);
pstmt = con.prepareStatement(sql.toString());
con.setAutoCommit(true);
}
catch (Exception e) {
- ;
+
+
}
freeConnection(con, pstmt);
* @return boolean liefert true zurueck, wenn loeschen erfolgreich war.
*/
public boolean delete(String id) throws StorageObjectFailure {
- invalidatePopupCache();
-
// ostore send notification
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
+ if (StoreUtil.extendsStorableEntity(entityClass)) {
String uniqueId = id;
- if (theEntityClass.equals(StorableObjectEntity.class)) {
+ if (entityClass.equals(StorableObjectEntity.class)) {
uniqueId += ("@" + mainTable);
}
logger.debug("CACHE: (del) " + id);
StoreIdentifier search_sid =
- new StoreIdentifier(theEntityClass,
+ new StoreIdentifier(entityClass,
StoreContainerType.STOC_TYPE_ENTITY, uniqueId);
o_store.invalidate(search_sid);
}
String sql =
"delete from " + mainTable + " where " + primaryKeyField + "='" + id + "'";
- //theLog.printInfo("DELETE " + sql);
+ logQueryBefore(sql);
try {
- con = getPooledCon();
+ con = obtainConnection();
stmt = con.createStatement();
res = stmt.executeUpdate(sql);
- } catch (SQLException sqe) {
+ }
+ catch (SQLException sqe) {
throwSQLException(sqe, "delete");
- } finally {
+ }
+ finally {
freeConnection(con, stmt);
}
+ invalidateStore();
+
return (res > 0) ? true : false;
}
/**
* Deletes entities based on a where clause
- *
- * @param aWhereClause
- * @return
- * @throws StorageObjectFailure
*/
public int deleteByWhereClause(String aWhereClause) throws StorageObjectFailure {
- invalidatePopupCache();
- if (StoreUtil.extendsStorableEntity(theEntityClass)) {
- StoreContainerType stoc_type = StoreContainerType.valueOf(theEntityClass, StoreContainerType.STOC_TYPE_ENTITYLIST);
- o_store.invalidate(stoc_type);
- }
+ invalidateStore();
Statement stmt = null;
Connection con = null;
//theLog.printInfo("DELETE " + sql);
try {
- con = getPooledCon();
+ con = obtainConnection();
stmt = con.createStatement();
res = stmt.executeUpdate(sql);
}
* @return immer false
*/
public boolean delete(EntityList theEntityList) {
- invalidatePopupCache();
-
return false;
}
- protected void invalidatePopupCache() {
- /** todo invalidates toooo much */
- }
-
/**
* Diese Methode fuehrt den Sqlstring <i>sql</i> aus und timed im Logfile.
* @param stmt Statemnt
public ResultSet executeSql(Statement stmt, String sql)
throws StorageObjectFailure, SQLException {
ResultSet rs;
+ logQueryBefore(sql);
long startTime = System.currentTimeMillis();
-
try {
rs = stmt.executeQuery(sql);
- logger.info((System.currentTimeMillis() - startTime) + "ms. for: " + sql);
+ logQueryAfter(sql, (System.currentTimeMillis() - startTime));
}
catch (SQLException e) {
- logger.error(e.getMessage() +"\n" + (System.currentTimeMillis() - startTime) + "ms. for: " + sql);
+ logQueryError(sql, (System.currentTimeMillis() - startTime), e);
throw e;
}
}
}
+ /**
+ * Executes 1 sql statement and returns the results as a <code>List</code> of
+ * <code>Map</code>s
+ */
public List executeFreeSql(String sql, int aLimit) throws StorageObjectFailure, StorageObjectExc {
Connection connection = null;
Statement statement = null;
try {
- List result = new Vector();
- connection = getPooledCon();
+ List result = new ArrayList();
+ connection = obtainConnection();
statement = connection.createStatement();
ResultSet resultset = executeSql(statement, sql);
try {
freeConnection(connection, statement);
}
}
- };
+ }
+ /**
+ * Executes 1 sql statement and returns the first result row as a <code>Map</code>s
+ * (<code>null</code> if there wasn't any row)
+ */
public Map executeFreeSingleRowSql(String anSqlStatement) throws StorageObjectFailure, StorageObjectExc {
try {
List resultList = executeFreeSql(anSqlStatement, 1);
try {
if (resultList.size()>0)
return (Map) resultList.get(0);
- else
- return null;
+ return null;
}
finally {
}
catch (Throwable t) {
throw new StorageObjectFailure(t);
}
- };
+ }
+ /**
+ * Executes 1 sql statement and returns the first column of the first result row as a <code>String</code>s
+ * (<code>null</code> if there wasn't any row)
+ */
public String executeFreeSingleValueSql(String sql) throws StorageObjectFailure, StorageObjectExc {
Map row = executeFreeSingleRowSql(sql);
Iterator i = row.values().iterator();
if (i.hasNext())
return (String) i.next();
- else
- return null;
- };
+ return null;
+ }
public int getSize(String where) throws SQLException, StorageObjectFailure {
return getSize("", null, where);
*/
public int getSize(String mainTablePrefix, List extraTables, String where) throws SQLException, StorageObjectFailure {
- long startTime = System.currentTimeMillis();
-
String useTable = mainTable;
if (mainTablePrefix!=null && mainTablePrefix.trim().length()>0) {
- useTable+=" "+mainTablePrefix;
+ useTable+=" "+mainTablePrefix;
}
StringBuffer countSql =
new StringBuffer("select count(*) from ").append(useTable);
Connection con = null;
Statement stmt = null;
int result = 0;
+ logQueryBefore(countSql.toString());
+ long startTime = System.currentTimeMillis();
try {
- con = getPooledCon();
+ con = obtainConnection();
stmt = con.createStatement();
ResultSet rs = executeSql(stmt, countSql.toString());
finally {
freeConnection(con, stmt);
}
- logger.info((System.currentTimeMillis() - startTime) + "ms. for: " + countSql);
+ logQueryAfter(countSql.toString(), (System.currentTimeMillis() - startTime));
return result;
}
public int executeUpdate(Statement stmt, String sql)
throws StorageObjectFailure, SQLException {
int rs;
+
+ logQueryBefore(sql);
long startTime = System.currentTimeMillis();
try {
rs = stmt.executeUpdate(sql);
- logger.info((System.currentTimeMillis() - startTime) + "ms. for: " + sql);
+ logQueryAfter(sql, (System.currentTimeMillis() - startTime));
}
catch (SQLException e) {
- logger.error("Failed: " + (System.currentTimeMillis() - startTime) + "ms. for: " + sql);
+ logQueryError(sql, (System.currentTimeMillis() - startTime), e);
throw e;
}
public int executeUpdate(String sql)
throws StorageObjectFailure, SQLException {
int result = -1;
- long startTime = System.currentTimeMillis();
Connection con = null;
PreparedStatement pstmt = null;
+ logQueryBefore(sql);
+ long startTime = System.currentTimeMillis();
try {
- con = getPooledCon();
+ con = obtainConnection();
pstmt = con.prepareStatement(sql);
result = pstmt.executeUpdate();
+ logQueryAfter(sql, System.currentTimeMillis() - startTime);
}
catch (Throwable e) {
- logger.error("Database.executeUpdate(" + sql + "): " + e.getMessage());
+ logQueryError(sql, System.currentTimeMillis() - startTime, e);
throw new StorageObjectFailure("Database.executeUpdate(" + sql + "): " + e.getMessage(), e);
}
finally {
freeConnection(con, pstmt);
}
-
- logger.info((System.currentTimeMillis() - startTime) + "ms. for: " + sql);
return result;
}
/**
- * Wertet ResultSetMetaData aus und setzt interne Daten entsprechend
- * @param md ResultSetMetaData
+ * Processes the metadata for the table this Database object is responsible for.
*/
- private void evalMetaData(ResultSetMetaData md) throws StorageObjectFailure {
- this.evaluatedMetaData = true;
- this.metadataFields = new ArrayList();
- this.metadataLabels = new ArrayList();
- this.metadataNotNullFields = new ArrayList();
+ private void processMetaData(ResultSetMetaData aMetaData) throws StorageObjectFailure {
+ fieldNames = new ArrayList();
+ fieldNameToType = new HashMap();
try {
- int numFields = md.getColumnCount();
- this.metadataTypes = new int[numFields];
-
- String aField;
- int aType;
+ int numFields = aMetaData.getColumnCount();
+ fieldTypes = new int[numFields];
for (int i = 1; i <= numFields; i++) {
- aField = md.getColumnName(i);
- metadataFields.add(aField);
- metadataLabels.add(md.getColumnLabel(i));
- aType = md.getColumnType(i);
- metadataTypes[i - 1] = aType;
-
- if (aField.equals(primaryKeyField)) {
- }
-
- if (md.isNullable(i) == ResultSetMetaData.columnNullable) {
- metadataNotNullFields.add(aField);
- }
+ fieldNames.add(aMetaData.getColumnName(i));
+ fieldTypes[i - 1] = aMetaData.getColumnType(i);
+ fieldNameToType.put(aMetaData.getColumnName(i), new Integer(aMetaData.getColumnType(i)));
}
}
catch (SQLException e) {
- throwSQLException(e, "evalMetaData");
+ throwSQLException(e, "processMetaData");
}
}
/**
- * Wertet die Metadaten eines Resultsets fuer eine Tabelle aus,
- * um die alle Columns und Typen einer Tabelle zu ermitteln.
+ * Retrieves metadata from the table this Database object represents
*/
- private void get_meta_data() throws StorageObjectFailure {
- Connection con = null;
- PreparedStatement pstmt = null;
+ private void acquireMetaData() throws StorageObjectFailure {
+ Connection connection = null;
+ PreparedStatement statement = null;
String sql = "select * from " + mainTable + " where 0=1";
try {
- con = getPooledCon();
- pstmt = con.prepareStatement(sql);
+ connection = obtainConnection();
+ statement = connection.prepareStatement(sql);
logger.debug("METADATA: " + sql);
- ResultSet rs = pstmt.executeQuery();
- evalMetaData(rs.getMetaData());
- rs.close();
+ ResultSet resultSet = statement.executeQuery();
+ try {
+ processMetaData(resultSet.getMetaData());
+ }
+ finally {
+ resultSet.close();
+ }
}
catch (SQLException e) {
- throwSQLException(e, "get_meta_data");
+ throwSQLException(e, "acquireMetaData");
}
finally {
- freeConnection(con, pstmt);
+ freeConnection(connection, statement);
}
}
- public Connection getPooledCon() throws StorageObjectFailure {
- Connection con = null;
-
+ public Connection obtainConnection() throws StorageObjectFailure {
try {
- con = SQLManager.getInstance().requestConnection();
+ return MirGlobal.getDatabaseEngine().obtainConnection();
}
- catch (SQLException e) {
- logger.error("could not connect to the database " + e.getMessage());
-
- throw new StorageObjectFailure("Could not connect to the database", e);
+ catch (Exception e) {
+ throw new StorageObjectFailure(e);
}
-
- return con;
}
- public void freeConnection(Connection con, Statement stmt)
- throws StorageObjectFailure {
- SQLManager.closeStatement(stmt);
- SQLManager.getInstance().returnConnection(con);
+ public void freeConnection(Connection aConnection, Statement aStatement) throws StorageObjectFailure {
+ try {
+ aStatement.close();
+ }
+ catch (Throwable t) {
+ logger.warn("Can't close statemnet: " + t.toString());
+ }
+
+ try {
+ MirGlobal.getDatabaseEngine().releaseConnection(aConnection);
+ }
+ catch (Throwable t) {
+ logger.warn("Can't release connection: " + t.toString());
+ }
}
/**
logger.error(aMessage);
throw new StorageObjectFailure(aMessage, null);
}
+
+ /**
+ * Invalidates any cached entity list
+ */
+ private void invalidateStore() {
+ // invalidating all EntityLists corresponding with entityClass
+ if (StoreUtil.extendsStorableEntity(entityClass)) {
+ StoreContainerType stoc_type =
+ StoreContainerType.valueOf(entityClass, StoreContainerType.STOC_TYPE_ENTITYLIST);
+ o_store.invalidate(stoc_type);
+ }
+ }
+
+ /**
+ * Retrieves a binary value
+ */
+ public InputStream getBinaryField(String aQuery) throws StorageObjectFailure, SQLException {
+ Connection connection=null;
+ Statement statement=null;
+ InputStream inputStream;
+ InputStream imageInputStream = null;
+
+ try {
+ connection = obtainConnection();
+ try {
+ connection.setAutoCommit(false);
+ statement = connection.createStatement();
+ ResultSet resultSet = executeSql(statement, aQuery);
+
+ if(resultSet!=null) {
+ if (resultSet.next()) {
+ if (resultSet.getMetaData().getColumnType(1) == java.sql.Types.BINARY) {
+ byte[] data = resultSet.getBytes(1);
+ imageInputStream = new ByteArrayInputStream(data);
+ }
+ else {
+ inputStream = resultSet.getBlob(1).getBinaryStream();
+ imageInputStream = new BinaryFieldInputStream(inputStream, connection, statement);
+ }
+ }
+ resultSet.close();
+ }
+ }
+ finally {
+ }
+ }
+ catch (Throwable t) {
+ logger.error("EntityImages.getImage failed: " + t.toString());
+ t.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
+
+ try {
+ connection.setAutoCommit(true);
+ }
+ catch (Throwable e) {
+ logger.error("EntityImages.getImage resetting transaction mode failed: " + e.toString());
+ e.printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
+ }
+
+ try {
+ freeConnection(connection, statement);
+ }
+ catch (Throwable e) {
+ logger.error("EntityImages.getImage freeing connection failed: " +e.toString());
+ }
+
+ throw new StorageObjectFailure(t);
+ }
+
+ return imageInputStream;
+ }
+
+ /**
+ * Sets a binary value for a particular field in a record specified by its identifier
+ */
+ public void setBinaryField(String aFieldName, String anObjectId, byte aData[]) throws StorageObjectFailure, SQLException {
+ PreparedStatement statement = null;
+ Connection connection = obtainConnection();
+
+ try {
+ connection.setAutoCommit(false);
+ try {
+ // are we using bytea ?
+ if (getFieldType(aFieldName) == java.sql.Types.BINARY) {
+ statement = connection.prepareStatement(
+ "update " + mainTable + " set " + aFieldName + " = ? where " + getIdFieldName() + "=" + Integer.parseInt(anObjectId));
+ statement.setBytes(1, aData);
+ statement.execute();
+ connection.commit();
+ }
+ // or the old oid's
+ else {
+ PGConnection postgresqlConnection = (org.postgresql.PGConnection) ((DelegatingConnection) connection).getDelegate();
+ LargeObjectManager lobManager = postgresqlConnection.getLargeObjectAPI();
+ int oid = lobManager.create(LargeObjectManager.READ | LargeObjectManager.WRITE);
+ LargeObject obj = lobManager.open(oid, LargeObjectManager.WRITE); // Now open the file File file =
+ obj.write(aData);
+ obj.close();
+ statement = connection.prepareStatement(
+ "update " + mainTable + " set " + aFieldName + " = ? where " + getIdFieldName() + "=" + Integer.parseInt(anObjectId));
+ statement.setInt(1, oid);
+ statement.execute();
+ connection.commit();
+ }
+ }
+ finally {
+ connection.setAutoCommit(true);
+ }
+ }
+ finally {
+ freeConnection(connection, statement);
+ }
+ }
+
+ private void logQueryBefore(String aQuery) {
+ logger.debug("about to perform QUERY " + aQuery);
+// (new Throwable()).printStackTrace(logger.asPrintWriter(LoggerWrapper.DEBUG_MESSAGE));
+ }
+
+ private void logQueryAfter(String aQuery, long aTime) {
+ logger.info("QUERY " + aQuery + " took " + aTime + "ms.");
+ }
+
+ private void logQueryError(String aQuery, long aTime, Throwable anException) {
+ logger.error("QUERY " + aQuery + " took " + aTime + "ms, but threw exception " + anException.toString());
+ }
+
+ private int getFieldType(String aFieldName) {
+ if (fieldNameToType == null) {
+ acquireMetaData();
+ }
+
+ return ((Integer) fieldNameToType.get(aFieldName)).intValue();
+ }
+
+
+ /**
+ * a small wrapper class that allows us to store the DB connection resources
+ * that the BlobInputStream is using and free them upon closing of the stream
+ */
+ private class BinaryFieldInputStream extends InputStream {
+ InputStream inputStream;
+ Connection connection;
+ Statement statement;
+
+ public BinaryFieldInputStream(InputStream aBlobInputStream, Connection aConnection, Statement aStatement ) {
+ inputStream = aBlobInputStream;
+ connection = aConnection;
+ statement = aStatement;
+ }
+
+ public void close () throws IOException {
+ inputStream.close();
+ try {
+ connection.setAutoCommit(true);
+ freeConnection(connection, statement);
+ }
+ catch (Exception e) {
+ throw new IOException("close(): "+e.toString());
+ }
+ }
+
+ public int read() throws IOException {
+ return inputStream.read();
+ }
+ }
}
projects / mir.git / blobdiff