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/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.distributed.internal;
import java.io.NotSerializableException;
import java.net.InetAddress;
import java.util.Collection;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.Vector;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import com.gemstone.gemfire.CancelCriterion;
import com.gemstone.gemfire.distributed.DistributedMember;
import com.gemstone.gemfire.distributed.Role;
import com.gemstone.gemfire.distributed.internal.locks.ElderState;
import com.gemstone.gemfire.distributed.internal.membership.InternalDistributedMember;
import com.gemstone.gemfire.distributed.internal.membership.MembershipManager;
import com.gemstone.gemfire.i18n.LogWriterI18n;
import com.gemstone.gemfire.internal.shared.Version;
/**
* This interface defines the services provided by any class that
* is a distribution manager.
*
* @author Darrel Schneider
*
*
*/
public interface DM extends ReplySender {
public void restartCommunications();
public boolean shutdownInProgress();
/**
* Returns the current "cache time" in milliseconds since the epoch.
* The "cache time" takes into account skew among the local clocks
* on the various machines involved in the cache.
*/
public long cacheTimeMillis();
/**
* Returns the id of this distribution manager.
*/
public InternalDistributedMember getDistributionManagerId();
/**
* Get a set of all other members (both admin ones and normal).
* @since 5.7
*/
public Set getAllOtherMembers();
/**
* Returns the ID in the membership view that is equal to the argument.
* If the ID is not in the view, the argument is returned.
*/
public InternalDistributedMember getCanonicalId(DistributedMember id);
/**
* removes members that have older versions from the given collection, typically
* a Set from a distribution advisor
* @since 7.5
*/
public void retainMembersWithSameOrNewerVersion(Collection members, Version version);
/**
* removes members that have the given version or later from the given collection,
* typically a Set from a distribution advisor
* @since 7.5
*/
public void removeMembersWithSameOrNewerVersion(Collection members, Version version);
/**
* Returns the least version of the members in the set.
* @param members the members to evaluate
* @return the least common version
* @since 8.1
*/
public Version leastCommonVersion(Collection members);
/**
* Returns an unmodifiable set containing the identities of all of
* the known distribution managers. As of 7.0 this includes locators
* since they have a cache.
*/
public Set getDistributionManagerIds();
/**
* Returns an unmodifiable set containing the identities of all of
* the known "normal" distribution managers.
* This does not include locators or admin members.
*/
public Set getNormalDistributionManagerIds();
/**
* Returns an unmodifiable set containing the identities of all of
* the known distribution managers including admin members.
* @since 5.7
*/
public Set getDistributionManagerIdsIncludingAdmin();
/**
* Returns a private-memory list containing getDistributionManagerIds()
* minus our id.
*/
public Set getOtherDistributionManagerIds();
/**
* Returns a private-memory list containing getNormalDistributionManagerIds()
* minus our id.
*/
public Set getOtherNormalDistributionManagerIds();
/**
* Add a membership listener and return other DistribtionManagerIds
* as an atomic operation
*/
public Set addMembershipListenerAndGetDistributionManagerIds(MembershipListener l);
/**
* Add a membership listener for all members
* and return other DistribtionManagerIds as an atomic operation
* @since 5.7
*/
public Set addAllMembershipListenerAndGetAllIds(MembershipListener l);
/**
* Returns the identity of this DistributionManager
*/
public InternalDistributedMember getId();
/**
* Return true if no other distribution manager was in this group
* when he joined.
*
* @since 4.0
*/
public boolean isAdam();
/**
* Returns the identity of the oldest DM in this group.
*
* Note that this method may return null (no valid elders exist).
*
* @return the elder member, possibly null
* @since 4.0
*/
public InternalDistributedMember getElderId();
/**
* Return true if this is the oldest DM in this group.
*
* @since 5.0
*/
public boolean isElder();
/**
* Return true if this DM is a loner that is not part of
* a real distributed system.
*/
public boolean isLoner();
/**
* Returns the elder state or null if this DM is not the elder.
*
* If useTryLock is true, then it will attempt to get a try-lock and throw
* IllegalStateException if another thread already holds the try-lock.
* @param force if true then this DM must become the elder.
* @param useTryLock if true then a try-lock will be used
* @throws IllegalStateException if elder try lock fails
* @since 4.0
*/
public ElderState getElderState(boolean force, boolean useTryLock);
/**
* Returns the id of the underlying distribution channel used for
* communication.
*
* @since 3.0
*/
public long getChannelId();
/**
* Adds a message to the outgoing queue. Note that
* message should not be modified after it has been
* added to the queue. After message is distributed,
* it will be recycled.
*
* @return recipients who did not receive the message
* @throws NotSerializableException
* If message cannot be serialized
* @see #putOutgoing(DistributionMessage)
*/
public Set putOutgoingUserData(DistributionMessage message)
throws NotSerializableException;
/**
* Sends a message, guaranteed to be serialized
*
* @see #putOutgoingUserData(DistributionMessage)
* @param msg
* @return recipients who did not receive the message
*/
public Set putOutgoing(DistributionMessage msg);
/**
* Returns the distributed system to which this distribution manager
* is connected.
*/
public InternalDistributedSystem getSystem();
/**
* Adds a MembershipListener to this distribution
* manager.
*/
public void addMembershipListener(MembershipListener l);
/**
* Removes a MembershipListener from this distribution
* manager.
*
* @throws IllegalArgumentException
* l was not registered on this distribution
* manager
*/
public void removeMembershipListener(MembershipListener l);
/**
* Removes a MembershipListener listening for all members
* from this distribution manager.
*
* @throws IllegalArgumentException
* l was not registered on this distribution
* manager
* @since 5.7
*/
public void removeAllMembershipListener(MembershipListener l);
public void addAdminConsole(InternalDistributedMember id);
public DMStats getStats();
/**
* Used to get the DistributionConfig so that Connection can
* figure out if it is configured for async comms.
* @since 4.2.1
*/
public DistributionConfig getConfig();
/**
* Makes note of a distribution manager that has shut down. Invokes
* the appropriate listeners.
*
* @param theId
* The id of the distribution manager starting up
*
* @see ShutdownMessage#process
*/
public void handleManagerDeparture(InternalDistributedMember theId,
boolean crashed, String reason);
/**
* Gets this distribution manager's logger. Messages can use this method
* to log diagnostic info about how the message is processed.
*/
public LogWriterI18n getLoggerI18n();
/**
* getThreadPool gets this distribution manager's message-processing thread pool */
public ExecutorService getThreadPool();
/**
* Return the high-priority message-processing executor */
public ExecutorService getHighPriorityThreadPool();
/**
* Return the waiting message-processing executor
*/
public ExecutorService getWaitingThreadPool();
/**
* Return the function message-processing executor
*/
public ExecutorService getFunctionExcecutor();
/**
* gets this distribution manager's message-processing executor
* for ordered (i.e. serialized) message processing
*/
// public Executor getSerialExecutor();
public void close();
/**
* Returns the ordered list of current DistributionManagers in
* oldest-to-youngest order. Added for DLockGrantor
*/
public Vector getViewMembers();
/**
* Returns the oldest member in the given set of distribution managers. The
* current implementation may use n*n/2 comparisons, so use this judiciously
*
* @return the oldest member of the given collection
* @throws NoSuchElementException when none of the given members is actually
* a member of the distributed system.
*/
public DistributedMember getOldestMember(Collection members) throws NoSuchElementException;
/**
* @return Set of Admin VM nodes
*/
public Set getAdminMemberSet();
/** Throws ShutdownException if closeInProgress returns true. */
public void throwIfDistributionStopped();
/** Returns count of members filling the specified role */
public int getRoleCount(Role role);
/** Returns true if at least one member is filling the specified role */
public boolean isRolePresent(Role role);
/** Returns a set of all roles currently in the distributed system. */
public Set getAllRoles();
/** Returns true if id is a current member of the distributed system */
public boolean isCurrentMember(InternalDistributedMember id);
/** Remove given member from list of members who are pending a
* startup reply
* @param m the member
* @param departed true if we're removing them due to membership
*/
public void removeUnfinishedStartup(InternalDistributedMember m,
boolean departed);
public void setUnfinishedStartups(Collection s);
/**
* Return the CancelCriterion for this DM.
*
* @return CancelCriterion for this DM
*/
public CancelCriterion getCancelCriterion();
/**
* Return the membership manager for this DM
* @return the membership manager
*/
public MembershipManager getMembershipManager();
/**
* Set the root cause for DM failure
* @param t the underlying failure
*/
public void setRootCause(Throwable t);
/**
* Return the underlying root cause for DM failure, possibly null
* @return the underlying root cause
*/
public Throwable getRootCause();
/**
* Return all members that are on the the this host
* @return set of {@link InternalDistributedMember} including this VM
* @since gemfire59poc
*/
public Set getMembersInThisZone();
/**
* Acquire a permit to request a GII from another member
*/
public void acquireGIIPermitUninterruptibly();
/**
* Release a permit to request a GII from another member.
*/
public void releaseGIIPermit();
public int getDistributedSystemId();
public boolean enforceUniqueZone();
public Set getMembersInSameZone(InternalDistributedMember acceptedMember);
public boolean areInSameZone(InternalDistributedMember member1,
InternalDistributedMember member2);
/**
* Returns true is the two members are on the same equivalent host machine
* based on overlapping IP addresses collected for all NICs on each member's
* machine.
*
* @param member1 First member
* @param member2 Second member
*/
public boolean areOnEquivalentHost(InternalDistributedMember member1,
InternalDistributedMember member2);
public Set getEquivalents(InetAddress in);
public Set getGroupMembers(String group);
/**
* Adds the entry in hostedLocators for a member with one or more
* hosted locators. The value is a collection of host[port] strings. If a
* bind-address was used for a locator then the form is bind-addr[port].
*
* This currently only tracks stand-alone/dedicated locators, not embedded
* locators.
*
* @since 6.6.3
*/
public void addHostedLocators(InternalDistributedMember member, Collection locators);
/**
* Gets the value in hostedLocators for a member with one or more
* hosted locators. The value is a collection of host[port] strings. If a
* bind-address was used for a locator then the form is bind-addr[port].
*
* This currently only tracks stand-alone/dedicated locators, not embedded
* locators.
*
* @since 6.6.3
*/
public Collection getHostedLocators(InternalDistributedMember member);
/**
* Gets the map of all members hosting locators. The key is the member, and
* the value is a collection of host[port] strings. If a bind-address was
* used for a locator then the form is bind-addr[port].
*
* This currently only tracks stand-alone/dedicated locators, not embedded
* locators.
*
* @since 6.6.3
*/
public Map> getAllHostedLocators();
/**
* Sets the deviation of this process's local time from the rest of the GemFire
* distributed system.
*
* @since 7.5
*/
public void setCacheTimeOffset(DistributedMember coord, long offset, boolean isJoin);
/**
* @return Offset for system time, calculated by distributed system coordinator.
* @since 7.5
*/
public long getCacheTimeOffset();
/**
* Forces use of UDP for communications in the current thread. UDP is
* connectionless, so no tcp/ip connections will be created or used for
* messaging until this setting is released with releaseUDPMessagingForCurrentThread.
*/
public void forceUDPMessagingForCurrentThread();
/**
* Releases use of UDP for all communications in the current thread,
* as established by forceUDPMessagingForCurrentThread.
*/
public void releaseUDPMessagingForCurrentThread();
}