Java Check类代码示例

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Creates a server instance.
 * <p>
 * It uses the provided configuration instead loading it from the config dir.
 *
 * @param name server name.
 * @param homeDir server home directory.
 * @param configDir config directory.
 * @param logDir log directory.
 * @param tempDir temp directory.
 * @param config server configuration.
 */
public Server(String name, String homeDir, String configDir, String logDir, String tempDir, Configuration config) {
  this.name = StringUtils.toLowerCase(Check.notEmpty(name, "name").trim());
  this.homeDir = Check.notEmpty(homeDir, "homeDir");
  this.configDir = Check.notEmpty(configDir, "configDir");
  this.logDir = Check.notEmpty(logDir, "logDir");
  this.tempDir = Check.notEmpty(tempDir, "tempDir");
  checkAbsolutePath(homeDir, "homeDir");
  checkAbsolutePath(configDir, "configDir");
  checkAbsolutePath(logDir, "logDir");
  checkAbsolutePath(tempDir, "tempDir");
  if (config != null) {
    this.config = new Configuration(false);
    ConfigurationUtils.copy(config, this.config);
  }
  status = Status.UNDEF;
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Sets a new server status.
 * <p>
 * The status must be settable.
 * <p>
 * All services will be notified o the status change via the
 * {@link Service#serverStatusChange(Server.Status, Server.Status)} method. If a service
 * throws an exception during the notification, the server will be destroyed.
 *
 * @param status status to set.
 *
 * @throws ServerException thrown if the service has been destroy because of
 * a failed notification to a service.
 */
public void setStatus(Status status) throws ServerException {
  Check.notNull(status, "status");
  if (status.settable) {
    if (status != this.status) {
      Status oldStatus = this.status;
      this.status = status;
      for (Service service : services.values()) {
        try {
          service.serverStatusChange(oldStatus, status);
        } catch (Exception ex) {
          log.error("Service [{}] exception during status change to [{}] -server shutting down-,  {}",
                    new Object[]{service.getInterface().getSimpleName(), status, ex.getMessage(), ex});
          destroy();
          throw new ServerException(ServerException.ERROR.S11, service.getInterface().getSimpleName(),
                                    status, ex.getMessage(), ex);
        }
      }
    }
  } else {
    throw new IllegalArgumentException("Status [" + status + " is not settable");
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Creates a server instance.
 * <p/>
 * It uses the provided configuration instead loading it from the config dir.
 *
 * @param name server name.
 * @param homeDir server home directory.
 * @param configDir config directory.
 * @param logDir log directory.
 * @param tempDir temp directory.
 * @param config server configuration.
 */
public Server(String name, String homeDir, String configDir, String logDir, String tempDir, Configuration config) {
  this.name = Check.notEmpty(name, "name").trim().toLowerCase();
  this.homeDir = Check.notEmpty(homeDir, "homeDir");
  this.configDir = Check.notEmpty(configDir, "configDir");
  this.logDir = Check.notEmpty(logDir, "logDir");
  this.tempDir = Check.notEmpty(tempDir, "tempDir");
  checkAbsolutePath(homeDir, "homeDir");
  checkAbsolutePath(configDir, "configDir");
  checkAbsolutePath(logDir, "logDir");
  checkAbsolutePath(tempDir, "tempDir");
  if (config != null) {
    this.config = new Configuration(false);
    ConfigurationUtils.copy(config, this.config);
  }
  status = Status.UNDEF;
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Sets a new server status.
 * <p/>
 * The status must be settable.
 * <p/>
 * All services will be notified o the status change via the
 * {@link Service#serverStatusChange(Server.Status, Server.Status)} method. If a service
 * throws an exception during the notification, the server will be destroyed.
 *
 * @param status status to set.
 *
 * @throws ServerException thrown if the service has been destroy because of
 * a failed notification to a service.
 */
public void setStatus(Status status) throws ServerException {
  Check.notNull(status, "status");
  if (status.settable) {
    if (status != this.status) {
      Status oldStatus = this.status;
      this.status = status;
      for (Service service : services.values()) {
        try {
          service.serverStatusChange(oldStatus, status);
        } catch (Exception ex) {
          log.error("Service [{}] exception during status change to [{}] -server shutting down-,  {}",
                    new Object[]{service.getInterface().getSimpleName(), status, ex.getMessage(), ex});
          destroy();
          throw new ServerException(ServerException.ERROR.S11, service.getInterface().getSimpleName(),
                                    status, ex.getMessage(), ex);
        }
      }
    }
  } else {
    throw new IllegalArgumentException("Status [" + status + " is not settable");
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
@Override
public void validate(String proxyUser, String proxyHost, String doAsUser) throws IOException,
  AccessControlException {
  Check.notEmpty(proxyUser, "proxyUser");
  Check.notEmpty(proxyHost, "proxyHost");
  Check.notEmpty(doAsUser, "doAsUser");
  LOG.debug("Authorization check proxyuser [{}] host [{}] doAs [{}]",
            new Object[]{proxyUser, proxyHost, doAsUser});
  if (proxyUserHosts.containsKey(proxyUser)) {
    proxyHost = normalizeHostname(proxyHost);
    validateRequestorHost(proxyUser, proxyHost, proxyUserHosts.get(proxyUser));
    validateGroup(proxyUser, doAsUser, proxyUserGroups.get(proxyUser));
  } else {
    throw new AccessControlException(MessageFormat.format("User [{0}] not defined as proxyuser", proxyUser));
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
@Override
public void validate(String proxyUser, String proxyHost, String doAsUser)
    throws IOException, AccessControlException {
  Check.notEmpty(proxyUser, "proxyUser");
  Check.notEmpty(proxyHost, "proxyHost");
  Check.notEmpty(doAsUser, "doAsUser");
  LOG.debug("Authorization check proxyuser [{}] host [{}] doAs [{}]",
      new Object[]{proxyUser, proxyHost, doAsUser});
  if (proxyUserHosts.containsKey(proxyUser)) {
    proxyHost = normalizeHostname(proxyHost);
    validateRequestorHost(proxyUser, proxyHost,
        proxyUserHosts.get(proxyUser));
    validateGroup(proxyUser, doAsUser, proxyUserGroups.get(proxyUser));
  } else {
    throw new AccessControlException(MessageFormat
        .format("User [{0}] not defined as proxyuser", proxyUser));
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
@Override
public void schedule(final Callable<?> callable, long delay, long interval, TimeUnit unit) {
  Check.notNull(callable, "callable");
  if (!scheduler.isShutdown()) {
    LOG.debug("Scheduling callable [{}], interval [{}] seconds, delay [{}] in [{}]",
              new Object[]{callable, delay, interval, unit});
    Runnable r = new Runnable() {
      @Override
      public void run() {
        String instrName = callable.getClass().getSimpleName();
        Instrumentation instr = getServer().get(Instrumentation.class);
        if (getServer().getStatus() == Server.Status.HALTED) {
          LOG.debug("Skipping [{}], server status [{}]", callable, getServer().getStatus());
          instr.incr(INST_GROUP, instrName + ".skips", 1);
        } else {
          LOG.debug("Executing [{}]", callable);
          instr.incr(INST_GROUP, instrName + ".execs", 1);
          Instrumentation.Cron cron = instr.createCron().start();
          try {
            callable.call();
          } catch (Exception ex) {
            instr.incr(INST_GROUP, instrName + ".fails", 1);
            LOG.error("Error executing [{}], {}", new Object[]{callable, ex.getMessage(), ex});
          } finally {
            instr.addCron(INST_GROUP, instrName, cron.stop());
          }
        }
      }
    };
    scheduler.scheduleWithFixedDelay(r, delay, interval, unit);
  } else {
    throw new IllegalStateException(
      MessageFormat.format("Scheduler shutting down, ignoring scheduling of [{}]", callable));
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
@Override
public void schedule(final Callable<?> callable, long delay, long interval,
    TimeUnit unit) {
  Check.notNull(callable, "callable");
  if (!scheduler.isShutdown()) {
    LOG.debug(
        "Scheduling callable [{}], interval [{}] seconds, delay [{}] in [{}]",
        new Object[]{callable, delay, interval, unit});
    Runnable r = new Runnable() {
      @Override
      public void run() {
        String instrName = callable.getClass().getSimpleName();
        Instrumentation instr = getServer().get(Instrumentation.class);
        if (getServer().getStatus() == Server.Status.HALTED) {
          LOG.debug("Skipping [{}], server status [{}]", callable,
              getServer().getStatus());
          instr.incr(INST_GROUP, instrName + ".skips", 1);
        } else {
          LOG.debug("Executing [{}]", callable);
          instr.incr(INST_GROUP, instrName + ".execs", 1);
          Instrumentation.Cron cron = instr.createCron().start();
          try {
            callable.call();
          } catch (Exception ex) {
            instr.incr(INST_GROUP, instrName + ".fails", 1);
            LOG.error("Error executing [{}], {}",
                new Object[]{callable, ex.getMessage(), ex});
          } finally {
            instr.addCron(INST_GROUP, instrName, cron.stop());
          }
        }
      }
    };
    scheduler.scheduleWithFixedDelay(r, delay, interval, unit);
  } else {
    throw new IllegalStateException(MessageFormat
        .format("Scheduler shutting down, ignoring scheduling of [{}]",
            callable));
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Sets a new server status.
 * <p/>
 * The status must be settable.
 * <p/>
 * All services will be notified o the status change via the
 * {@link Service#serverStatusChange(Server.Status, Server.Status)} method. If
 * a service
 * throws an exception during the notification, the server will be destroyed.
 *
 * @param status
 *     status to set.
 * @throws ServerException
 *     thrown if the service has been destroy because of
 *     a failed notification to a service.
 */
public void setStatus(Status status) throws ServerException {
  Check.notNull(status, "status");
  if (status.settable) {
    if (status != this.status) {
      Status oldStatus = this.status;
      this.status = status;
      for (Service service : services.values()) {
        try {
          service.serverStatusChange(oldStatus, status);
        } catch (Exception ex) {
          log.error(
              "Service [{}] exception during status change to [{}] -server shutting down-,  {}",
              new Object[]{service.getInterface().getSimpleName(), status,
                  ex.getMessage(), ex});
          destroy();
          throw new ServerException(ServerException.ERROR.S11,
              service.getInterface().getSimpleName(), status, ex.getMessage(),
              ex);
        }
      }
    }
  } else {
    throw new IllegalArgumentException(
        "Status [" + status + " is not settable");
  }
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Creates a server instance.
 * <p/>
 * It uses the provided configuration instead loading it from the config dir.
 *
 * @param name
 *     server name.
 * @param homeDir
 *     server home directory.
 * @param configDir
 *     config directory.
 * @param logDir
 *     log directory.
 * @param tempDir
 *     temp directory.
 * @param config
 *     server configuration.
 */
public Server(String name, String homeDir, String configDir, String logDir,
    String tempDir, Configuration config) {
  this.name = Check.notEmpty(name, "name").trim().toLowerCase();
  this.homeDir = Check.notEmpty(homeDir, "homeDir");
  this.configDir = Check.notEmpty(configDir, "configDir");
  this.logDir = Check.notEmpty(logDir, "logDir");
  this.tempDir = Check.notEmpty(tempDir, "tempDir");
  checkAbsolutePath(homeDir, "homeDir");
  checkAbsolutePath(configDir, "configDir");
  checkAbsolutePath(logDir, "logDir");
  checkAbsolutePath(tempDir, "tempDir");
  if (config != null) {
    this.config = new Configuration(false);
    ConfigurationUtils.copy(config, this.config);
  }
  status = Status.UNDEF;
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Convenience method that returns a resource as inputstream from the
 * classpath.
 * <p>
 * It first attempts to use the Thread's context classloader and if not
 * set it uses the <code>ClassUtils</code> classloader.
 *
 * @param name resource to retrieve.
 *
 * @return inputstream with the resource, NULL if the resource does not
 *         exist.
 */
static InputStream getResource(String name) {
  Check.notEmpty(name, "name");
  ClassLoader cl = Thread.currentThread().getContextClassLoader();
  if (cl == null) {
    cl = Server.class.getClassLoader();
  }
  return cl.getResourceAsStream(name);
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Returns the {@link Service} associated to the specified interface.
 *
 * @param serviceKlass service interface.
 *
 * @return the service implementation.
 */
@SuppressWarnings("unchecked")
public <T> T get(Class<T> serviceKlass) {
  ensureOperational();
  Check.notNull(serviceKlass, "serviceKlass");
  return (T) services.get(serviceKlass);
}
 

import org.apache.hadoop.lib.util.Check; //导入依赖的package包/类
/**
 * Convenience method that returns a resource as inputstream from the
 * classpath.
 * <p/>
 * It first attempts to use the Thread's context classloader and if not
 * set it uses the <code>ClassUtils</code> classloader.
 *
 * @param name resource to retrieve.
 *
 * @return inputstream with the resource, NULL if the resource does not
 *         exist.
 */
static InputStream getResource(String name) {
  Check.notEmpty(name, "name");
  ClassLoader cl = Thread.currentThread().getContextClassLoader();
  if (cl == null) {
    cl = Server.class.getClassLoader();
  }
  return cl.getResourceAsStream(name);
}