Examples of org.h2.constant.DbSettings

org.h2.message.TraceSystem
This class contains various database-level settings. To override the documented default value for a database, append the setting in the database URL: "jdbc:h2:test;ALIAS_COLUMN_NAME=TRUE" when opening the first connection to the database. The settings can not be changed once the database is open.
Some settings are a last resort and temporary solution to work around a problem in the application or database engine. Also, there are system properties to enable features that are not yet fully tested or that are not backward compatible.

    }


    private void readProperties(Properties info) {
        Object[] list = new Object[info.size()];
        info.keySet().toArray(list);
        DbSettings s = null;
        for (Object k : list) {
            String key = StringUtils.toUpperEnglish(k.toString());
            if (prop.containsKey(key)) {
                throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);
            }
            Object value = info.get(k);
            if (isKnownSetting(key)) {
                prop.put(key, value);
            } else {
                if (s == null) {
                    s = getDbSettings();
                }
                if (s.containsKey(key)) {
                    prop.put(key, value);
                }
            }
        }
    }

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            }
        }
    }


    private void readSettingsFromURL() {
        DbSettings dbSettings = DbSettings.getInstance(null);
        int idx = url.indexOf(';');
        if (idx >= 0) {
            String settings = url.substring(idx + 1);
            url = url.substring(0, idx);
            String[] list = StringUtils.arraySplit(settings, ';', false);
            for (String setting : list) {
                int equal = setting.indexOf('=');
                if (equal < 0) {
                    throw getFormatException();
                }
                String value = setting.substring(equal + 1);
                String key = setting.substring(0, equal);
                key = StringUtils.toUpperEnglish(key);
                if (!isKnownSetting(key) && !dbSettings.containsKey(key)) {
                    throw DbException.get(ErrorCode.UNSUPPORTED_SETTING_1, key);
                }
                String old = prop.getProperty(key);
                if (old != null && !old.equals(value)) {
                    throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);

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        persistent = false;
        this.name = serverKey;
    }


    DbSettings getDbSettings() {
        DbSettings defaultSettings = DbSettings.getInstance(null);
        HashMap<String, String> s = null;
        for (Object k : prop.keySet()) {
            String key = k.toString();
            if (!isKnownSetting(key) && defaultSettings.containsKey(key)) {
                if (s == null) {
                    s = New.hashMap();
                }
                s.put(key, prop.getProperty(key));
            }

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            } catch (InterruptedException e) {
                // ignore
            }
        }
        session.setAllowLiterals(true);
        DbSettings defaultSettings = DbSettings.getInstance(null);
        for (String setting : ci.getKeys()) {
            if (defaultSettings.containsKey(setting)) {
                // database setting are only used when opening the database
                continue;
            }
            String value = ci.getProperty(setting);
            try {

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    }


    private void readProperties(Properties info) {
        Object[] list = new Object[info.size()];
        info.keySet().toArray(list);
        DbSettings s = null;
        for (Object k : list) {
            String key = StringUtils.toUpperEnglish(k.toString());
            if (prop.containsKey(key)) {
                throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);
            }
            Object value = info.get(k);
            if (isKnownSetting(key)) {
                prop.put(key, value);
            } else {
                if (s == null) {
                    s = getDbSettings();
                }
                if (s.containsKey(key)) {
                    prop.put(key, value);
                }
            }
        }
    }

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            }
        }
    }


    private void readSettingsFromURL() {
        DbSettings dbSettings = DbSettings.getInstance(null);
        int idx = url.indexOf(';');
        if (idx >= 0) {
            String settings = url.substring(idx + 1);
            url = url.substring(0, idx);
            String[] list = StringUtils.arraySplit(settings, ';', false);
            for (String setting : list) {
                if (setting.length() == 0) {
                    continue;
                }
                int equal = setting.indexOf('=');
                if (equal < 0) {
                    throw getFormatException();
                }
                String value = setting.substring(equal + 1);
                String key = setting.substring(0, equal);
                key = StringUtils.toUpperEnglish(key);
                if (!isKnownSetting(key) && !dbSettings.containsKey(key)) {
                    throw DbException.get(ErrorCode.UNSUPPORTED_SETTING_1, key);
                }
                String old = prop.getProperty(key);
                if (old != null && !old.equals(value)) {
                    throw DbException.get(ErrorCode.DUPLICATE_PROPERTY_1, key);

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        persistent = false;
        this.name = serverKey;
    }


    DbSettings getDbSettings() {
        DbSettings defaultSettings = DbSettings.getInstance(null);
        HashMap<String, String> s = null;
        for (Object k : prop.keySet()) {
            String key = k.toString();
            if (!isKnownSetting(key) && defaultSettings.containsKey(key)) {
                if (s == null) {
                    s = New.hashMap();
                }
                s.put(key, prop.getProperty(key));
            }

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        testReadOnly();
        testAdapter();
    }


    private static void testAdapter() {
        TraceSystem ts = new TraceSystem(null);
        ts.setLevelFile(TraceSystem.ADAPTER);
        ts.getTrace("test").info("test");
        ts.close();
    }

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        ts.getTrace("test").info("test");
        ts.close();
    }


    private void testTraceDebug() {
        TraceSystem ts = new TraceSystem(null);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ts.setSysOut(new PrintStream(out));
        ts.setLevelSystemOut(TraceSystem.DEBUG);
        ts.getTrace("test").debug(new Exception("error"), "test");
        ts.close();
        String outString = new String(out.toByteArray());
        assertContains(outString, "error");
        assertContains(outString, "Exception");
        assertContains(outString, "test");
    }

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    private void testReadOnly() throws Exception {
        String readOnlyFile = getBaseDir() + "/readOnly.log";
        IOUtils.delete(readOnlyFile);
        IOUtils.openFileOutputStream(readOnlyFile, false).close();
        FileSystem.getInstance(getBaseDir()).setReadOnly(readOnlyFile);
        TraceSystem ts = new TraceSystem(readOnlyFile);
        ts.setLevelFile(TraceSystem.INFO);
        ts.getTrace("test").info("test");
        IOUtils.delete(readOnlyFile);
        ts.close();
    }

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