Список литературы:

1. Арнолд, Гослинг, Холмс. Язык программирования Java. Вильямс, 2001.

2. Хабибуллин И. Самоучитель Java. - СПб, БХВ 2008.

3. Документация, справочники, руководства, дистрибутивы Java. [Online] http://java.sun.com

4. Взаимодействие с базой данных через JDBC [Online] http://citforum.ru/database/oracle/java_oracle_data/

Приложение 1.

Код приложение для лицензирования.

import com.macrovision.flexlm.FeatureSpecifier; import com.macrovision.flexlm.FlexlmException; import com.macrovision.flexlm.License; import com.macrovision.flexlm.LicenseSource; import com.macrovision.flexlm.VendorInfo; import com.macrovision.flexlm.licsource.LicenseServer; public class LicenseFlexNet { // занять 1 лицензию и вернуть ее объект пользвателю или null если произошел сбой public static FlexlmException LastError; static int errOk = 0; static int errKey = 1; static int errHostId = 2; static int errBeforeStart = 3; static int errExpired = 4; static int errNotFound = 10;// (в файле нет строки для нашего приложения и версии) static int errOpenFile = 11; static int errNoMoreLicenses = 21; //(лицензии кончились) public static Object checkout(String licenseFileName, String app, String version) { License lc = null; try { FeatureSpecifier fs = new FeatureSpecifier(app, version); VendorInfo vf = new GEOLIDERInfo(); lc = new License(fs, licenseFileName, vf, null); lc.checkout(1); } catch (FlexlmException e) { LastError = e; System.out.print(e.getMessage()); lc = null; } return lc; } /** освободить лицензию*/ public static boolean checkin(String licenseFileName, String app, String version, Object license) { License lc = null; lc = (License)license; try { lc.checkin(); } catch(FlexlmException e) { LastError = e; return true; } return false; } public static String GetLastError() { switch (LastError.getMajor()) { case 0 : return String.valueOf(errOk); case -44 : return String.valueOf(errKey); case -503 : return String.valueOf(errHostId); case -15 : return String.valueOf(errBeforeStart); case -50 : return String.valueOf(errExpired); case -1 : return String.valueOf(errNotFound); case -30 : return String.valueOf(errOpenFile); case -101 : return String.valueOf(errNoMoreLicenses); default : return ""; } } public static int getUsedLicQuantity(String licenseFileName, String app, String version) { License lc = null; int res = -1; try { FeatureSpecifier fs = new FeatureSpecifier(app, version); VendorInfo vf = new GEOLIDERInfo(); lc = new License(fs, licenseFileName, vf, null); res = lc.getCount(); } catch (FlexlmException e) { LastError = e; } return res; } public static final String defPath = "@localhost&license.lic"; public static final String defVersion = "1.000"; public static final void main(String arg[]) { if (arg.length < 1) { System.out.print("Incorrect parametrs"); System.exit(1); } String LicName = arg.length > 2 ? arg[2] : defPath; String ver = arg.length > 1 ? arg[1] : defVersion; String app = arg[0]; Object lic = checkout(LicName, app, ver); if (lic != null) { System.out.print("yes"); //checkin(LicName, app, ver, lic); } else { System.out.print("no"); } } }

Приложение 2.

Класс приложения расширенного пула. import java.sql.*; import java.util.LinkedList; import java.util.Properties; import oracle.jdbc.pool.OracleConnectionCache; import oracle.jdbc.pool.OracleConnectionCacheCallback; import oracle.jdbc.pool.OracleConnectionCacheManager; import oracle.jdbc.pool.OracleConnectionPoolDataSource; import oracle.jdbc.pool.OracleDataSource; import oracle.jdbc.driver.*; public class Pool { //Thread for queue actions private class ThreadGetConnection implements Runnable { public Object t1,t2; public ThreadGetConnection(Object f1, Object f2) { t1 = f1; t2 = f2; } @Override public void run() { synchronized (t1) { try { t1.wait(); } catch (InterruptedException e) { System.out.println(e.getMessage()); } } synchronized (t2) { t2.notifyAll(); } } } //processor queue actions private class PoolWorker extends Thread { public void run() { Object r; while (true) { synchronized(queue) { while (queue.isEmpty() || MaxLimitConnection - CountActive == 0) { try{ queue.wait(); }catch (InterruptedException ignored){ } } r = queue.removeFirst(); } synchronized (r) { CountActive++; r.notifyAll(); } } } } public String defUser = "administrator"; public String defPass = ""; public String defHost = "xeon"; public String defPort = "1521"; public String defService = "PVIV"; public int INF = 100; private OracleDataSource ods = null; private int MaxLimitConnection; private int MinLimitConnection; private int CountInitConnection; private int MaxLimitStatment; private Connection []Conns; private int[] Used; private int[] CountUsed; public int CountAlive; public int CountActive; private LinkedList<Object> queue = new LinkedList<Object>(); private PoolWorker pw; public Pool() { ods = null; } public Pool(String[] args, int[] args2) { String User = args.length > 0 ? args[0] : defUser; String Pass = args.length > 1 ? args[1] : defPass; String Host = args.length > 2 ? args[2] : defHost; String Port = args.length > 3 ? args[3] : defPort; String Service = args.length > 4 ? args[4] : defService; String url = "jdbc:oracle:thin:" + "@//" + Host + ":" + Port + "/" + Service; MaxLimitConnection = args2.length > 0 ? args2[0] : INF; MinLimitConnection = args2.length > 1 ? args2[1] : 0; CountInitConnection = args2.length > 2 ? args2[2] : 0; MaxLimitStatment = args2.length > 3 ? args2[3] : INF; try { ods = new OracleDataSource(); ods.setURL(url); if (Pass == "") { Properties props = new Properties(); props.setProperty(OracleConnection.CONNECTION_PROPERTY_THIN_VSESSION_OSUSER, User); ods.setConnectionProperties(props); } else { ods.setUser(User); ods.setPassword(Pass); } Conns = new Connection[MaxLimitConnection]; Used = new int[MaxLimitConnection]; CountUsed = new int[MaxLimitConnection]; for (int i=0; i<CountInitConnection; i++) Conns[i] = ods.getConnection(); CountAlive = CountInitConnection; CountActive = 0; pw = new PoolWorker(); pw.start(); } catch (SQLException e) { System.out.println(e.getMessage()); } } private synchronized Connection getNewConnection() { try { for (int i=0; i<MaxLimitConnection; i++) if (Conns[i] != null && Used[i] == 0) { Used[i] = 1; CountUsed[i]++; return Conns[i]; } for (int i=0; i<MaxLimitConnection; i++) if (Conns[i] == null) { Conns[i] = ods.getConnection(); Used[i] = 1; CountUsed[i]++; CountAlive++; return Conns[i]; } } catch (SQLException e) { System.out.println(e.getMessage()); } return null; } public Connection getConnection() { Object f1 = new Object(); Object f2 = new Object(); ThreadGetConnection tgc = new ThreadGetConnection(f1,f2); new Thread(tgc).start(); try { Thread.sleep(10); } catch (InterruptedException e) {} synchronized (queue) { queue.addLast(f1); queue.notifyAll(); } synchronized (f2) { try { f2.wait(); } catch (InterruptedException e) { System.out.println(e.getMessage()); } } return getNewConnection(); } public synchronized Connection releaseConnection(Connection cn) { try { for (int i=0; i<MaxLimitConnection; i++) if (Conns[i] == cn) { Used[i] = 0; if (CountUsed[i] == MaxLimitStatment && CountAlive > MinLimitConnection) { CountUsed[i] = 0; Conns[i].close(); Conns[i] = null; } CountActive--; break; } } catch (SQLException e) { System.out.println(e.getMessage()); } synchronized (queue) { queue.notifyAll(); } return null; } public String getInfo() { String res = ""; res += MaxLimitConnection + " максимальное " + MinLimitConnection + " минимальное количество поддерживаемых соединений\n"; res += CountAlive + " всего соединений из них: "; res += CountActive + " активных и " + (CountAlive - CountActive) + " доступных\n"; return res; } @SuppressWarnings("deprecation") public void close() { pw.stop(); for (int i = 0; i < Conns.length; i++) try { if (Conns[i] != null) Conns[i].close(); } catch (SQLException e) { System.out.println(e.getMessage()); queue.clear(); } } }

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