How to use

writeConstraint

method

in

org.apache.hadoop.hbase.constraint.Constraints

/**
 * Write the raw constraint and configuration to the descriptor.
 * <p>
 * This method takes care of creating a new configuration based on the passed
 * in configuration and then updating that with enabled and priority of the
 * constraint.
 * <p>
 * When a constraint is added, it is automatically enabled.
 */
private static void addConstraint(HTableDescriptor desc,
  Class<? extends Constraint> clazz, Configuration conf, long priority)
  throws IOException {
 writeConstraint(desc, serializeConstraintClass(clazz),
   configure(conf, true, priority));
}

/**
 * Change the whether the constraint (if it is already present) is enabled or
 * disabled.
 */
private static void changeConstraintEnabled(HTableDescriptor desc,
  Class<? extends Constraint> clazz, boolean enabled) throws IOException {
 // get the original constraint
 Pair<String, String> entry = getKeyValueForClass(desc, clazz);
 if (entry == null) {
  throw new IllegalArgumentException("Constraint: " + clazz.getName()
    + " is not associated with this table. You can't enable it!");
 }
 // create a new configuration from that conf
 Configuration conf = readConfiguration(entry.getSecond());
 // set that it is enabled
 conf.setBoolean(ENABLED_KEY, enabled);
 // write it back out
 writeConstraint(desc, entry.getFirst(), conf);
}

writeConstraint(desc, e.getFirst(), conf);

/**
 * Write the raw constraint and configuration to the descriptor.
 * <p>
 * This method takes care of creating a new configuration based on the passed
 * in configuration and then updating that with enabled and priority of the
 * constraint.
 * <p>
 * When a constraint is added, it is automatically enabled.
 */
private static void addConstraint(HTableDescriptor desc,
  Class<? extends Constraint> clazz, Configuration conf, long priority)
  throws IOException {
 writeConstraint(desc, serializeConstraintClass(clazz),
   configure(conf, true, priority));
}

/**
 * Write the raw constraint and configuration to the descriptor.
 * <p>
 * This method takes care of creating a new configuration based on the passed
 * in configuration and then updating that with enabled and priority of the
 * constraint.
 * <p>
 * When a constraint is added, it is automatically enabled.
 */
private static void addConstraint(HTableDescriptor desc,
  Class<? extends Constraint> clazz, Configuration conf, long priority)
  throws IOException {
 writeConstraint(desc, serializeConstraintClass(clazz),
   configure(conf, true, priority));
}

/**
 * Change the whether the constraint (if it is already present) is enabled or
 * disabled.
 */
private static void changeConstraintEnabled(HTableDescriptor desc,
  Class<? extends Constraint> clazz, boolean enabled) throws IOException {
 // get the original constraint
 Pair<String, String> entry = getKeyValueForClass(desc, clazz);
 if (entry == null) {
  throw new IllegalArgumentException("Constraint: " + clazz.getName()
    + " is not associated with this table. You can't enable it!");
 }
 // create a new configuration from that conf
 Configuration conf = readConfiguration(entry.getSecond());
 // set that it is enabled
 conf.setBoolean(ENABLED_KEY, enabled);
 // write it back out
 writeConstraint(desc, entry.getFirst(), conf);
}

/**
 * Change the whether the constraint (if it is already present) is enabled or
 * disabled.
 */
private static void changeConstraintEnabled(HTableDescriptor desc,
  Class<? extends Constraint> clazz, boolean enabled) throws IOException {
 // get the original constraint
 Pair<String, String> entry = getKeyValueForClass(desc, clazz);
 if (entry == null) {
  throw new IllegalArgumentException("Constraint: " + clazz.getName()
    + " is not associated with this table. You can't enable it!");
 }
 // create a new configuration from that conf
 Configuration conf = readConfiguration(entry.getSecond());
 // set that it is enabled
 conf.setBoolean(ENABLED_KEY, enabled);
 // write it back out
 writeConstraint(desc, entry.getFirst(), conf);
}

writeConstraint(desc, e.getFirst(), conf);

writeConstraint(desc, e.getFirst(), conf);