brooklyn.location.basic.FixedListMachineProvisioningLocation Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of brooklyn-core Show documentation
Show all versions of brooklyn-core Show documentation
Entity implementation classes, events, and other core elements
package brooklyn.location.basic;
import static brooklyn.util.GroovyJavaMethods.truth;
import java.io.Closeable;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import brooklyn.location.Location;
import brooklyn.location.MachineLocation;
import brooklyn.location.MachineProvisioningLocation;
import brooklyn.location.NoMachinesAvailableException;
import brooklyn.util.collections.MutableMap;
import brooklyn.util.flags.SetFromFlag;
import brooklyn.util.text.WildcardGlobs;
import brooklyn.util.text.WildcardGlobs.PhraseTreatment;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.google.common.io.Closeables;
/**
* A provisioner of {@link MachineLocation}s which takes a list of machines it can connect to.
* The collection of initial machines should be supplied in the 'machines' flag in the constructor,
* for example a list of machines which can be SSH'd to.
*
* This can be extended to have a mechanism to make more machines to be available
* (override provisionMore and canProvisionMore).
*/
public class FixedListMachineProvisioningLocation extends AbstractLocation
implements MachineProvisioningLocation, Closeable {
// TODO Synchronization looks very wrong for accessing machines/inUse
// e.g. removeChildLocation doesn't synchronize when doing machines.remove(...),
// and getMachines() returns the real sets risking
// ConcurrentModificationException in the caller if it iterates over them etc.
private Object lock;
@SetFromFlag
protected Set machines;
@SetFromFlag
protected Set inUse;
@SetFromFlag
protected Set pendingRemoval;
public FixedListMachineProvisioningLocation() {
this(Maps.newLinkedHashMap());
}
public FixedListMachineProvisioningLocation(Map properties) {
super(properties);
if (isLegacyConstruction()) {
init();
}
}
@Override
public void init() {
super.init();
for (MachineLocation location: machines) {
// FIXME Bad casting
Location machine = (Location) location;
Location parent = machine.getParent();
if (parent != null && !parent.equals(this))
throw new IllegalStateException("Machines must not have a parent location, but machine '"+machine.getDisplayName()+"' has its parent location set");
addChildLocation(machine);
}
}
@Override
public String toVerboseString() {
return Objects.toStringHelper(this).omitNullValues()
.add("id", getId()).add("name", getDisplayName())
.add("machinesAvailable", getAvailable()).add("machinesInUse", getInUse())
.toString();
}
@Override
public void configure(Map properties) {
if (lock == null) {
lock = new Object();
machines = Sets.newLinkedHashSet();
inUse = Sets.newLinkedHashSet();
pendingRemoval = Sets.newLinkedHashSet();
}
super.configure(properties);
}
public FixedListMachineProvisioningLocation newSubLocation(Map newFlags) {
return LocationCreationUtils.newSubLocation(newFlags, this);
}
@Override
public void close() {
for (T machine : machines) {
if (machine instanceof Closeable) Closeables.closeQuietly((Closeable)machine);
}
}
public void addMachine(T machine) {
synchronized (lock) {
if (machines.contains(machine)) {
throw new IllegalArgumentException("Cannot add "+machine+" to "+toString()+", because already contained");
}
Location existingParent = ((Location)machine).getParent();
if (existingParent != null && !existingParent.equals(this))
throw new IllegalStateException("Machine "+machine+" must not have a parent location to be added to "+toString()+", but parent is already set to '"+existingParent+"'");
addChildLocation((Location)machine);
machines.add(machine);
}
}
public void removeMachine(T machine) {
synchronized (lock) {
if (inUse.contains(machine)) {
pendingRemoval.add(machine);
} else {
machines.remove(machine);
pendingRemoval.remove(machine);
removeChildLocation((Location)machine);
}
}
}
protected Set getMachines() {
return machines;
}
public Set getAvailable() {
Set a = Sets.newLinkedHashSet(machines);
a.removeAll(inUse);
return a;
}
public Set getInUse() {
return Sets.newLinkedHashSet(inUse);
}
public Set getAllMachines() {
return ImmutableSet.copyOf(machines);
}
@Override
public void addChild(Location child) {
super.addChild(child);
machines.add((T)child);
}
@Override
protected boolean removeChild(Location child) {
if (inUse.contains(child)) {
throw new IllegalStateException("Child location "+child+" is in use; cannot remove from "+this);
}
machines.remove(child);
return super.removeChild(child);
}
public boolean canProvisionMore() { return false; }
public void provisionMore(int size) { throw new IllegalStateException("more not permitted"); }
public T obtain() throws NoMachinesAvailableException {
return obtain(Maps.newLinkedHashMap());
}
@Override
public T obtain(Map flags) throws NoMachinesAvailableException {
T machine;
T desiredMachine = (T) flags.get("desiredMachine");
synchronized (lock) {
Set a = getAvailable();
if (a.isEmpty()) {
if (canProvisionMore()) {
provisionMore(1);
a = getAvailable();
}
if (a.isEmpty())
throw new NoMachinesAvailableException("No machines available in "+toString());
}
if (desiredMachine != null) {
if (a.contains(desiredMachine)) {
machine = desiredMachine;
} else {
throw new IllegalStateException("Desired machine "+desiredMachine+" not available in "+toString()+"; "+
(inUse.contains(desiredMachine) ? "machine in use" : "machine unknown"));
}
} else {
machine = a.iterator().next();
}
inUse.add(machine);
}
return machine;
}
@Override
public void release(T machine) {
synchronized (lock) {
if (inUse.contains(machine) == false)
throw new IllegalStateException("Request to release machine "+machine+", but this machine is not currently allocated");
inUse.remove(machine);
if (pendingRemoval.contains(machine)) {
removeMachine(machine);
}
}
}
@Override
public Map getProvisioningFlags(Collection tags) {
return Maps.newLinkedHashMap();
}
/**
* Facilitates fluent/programmatic style for constructing a fixed pool of machines.
*
* {@code
* new FixedListMachineProvisioningLocation.Builder()
* .user("alex")
* .keyFile("/Users/alex/.ssh/id_rsa")
* .addAddress("10.0.0.1")
* .addAddress("10.0.0.2")
* .addAddress("10.0.0.3")
* .addAddressMultipleTimes("[email protected]", 5)
* .build();
* }
*
*/
public static class Builder {
String user;
String privateKeyPassphrase;
String privateKeyFile;
String privateKeyData;
File localTempDir;
List machines = Lists.newArrayList();
public Builder user(String user) {
this.user = user;
return this;
}
public Builder keyPassphrase(String keyPassphrase) {
this.privateKeyPassphrase = keyPassphrase;
return this;
}
public Builder keyFile(String keyFile) {
this.privateKeyFile = keyFile;
return this;
}
public Builder keyData(String keyData) {
this.privateKeyData = keyData;
return this;
}
public Builder localTempDir(File val) {
this.localTempDir = val;
return this;
}
/** adds the locations; user and keyfile set in the builder are _not_ applied to the machine
* (use add(String address) for that)
*/
public Builder add(SshMachineLocation location) {
machines.add(location);
return this;
}
public Builder addAddress(String address) {
return addAddresses(address);
}
public Builder addAddressMultipleTimes(String address, int n) {
for (int i=0; i addrs = new ArrayList();
addrs.addAll(WildcardGlobs.getGlobsAfterBraceExpansion("{"+address1+"}",
true /* numeric */, /* no quote support though */ PhraseTreatment.NOT_A_SPECIAL_CHAR, PhraseTreatment.NOT_A_SPECIAL_CHAR));
for (String address: others)
addrs.addAll(WildcardGlobs.getGlobsAfterBraceExpansion("{"+address+"}",
true /* numeric */, /* no quote support though */ PhraseTreatment.NOT_A_SPECIAL_CHAR, PhraseTreatment.NOT_A_SPECIAL_CHAR));
for (String addr: addrs)
add(new SshMachineLocation(makeConfig(addr)));
return this;
}
private Map makeConfig(String address) {
String user = this.user;
if (address.contains("@")) {
user = address.substring(0, address.indexOf("@"));
address = address.substring(address.indexOf("@")+1);
}
Map config = MutableMap.of("address", address);
if (truth(user)) {
config.put("user", user);
config.put("sshconfig.user", user);
}
if (truth(privateKeyPassphrase)) config.put("sshconfig.privateKeyPassphrase", privateKeyPassphrase);
if (truth(privateKeyFile)) config.put("sshconfig.privateKeyFile", privateKeyFile);
if (truth(privateKeyData)) config.put("sshconfig.privateKey", privateKeyData);
if (truth(localTempDir)) config.put("localTempDir", localTempDir);
return config;
}
public FixedListMachineProvisioningLocation build() {
return new FixedListMachineProvisioningLocation(MutableMap.builder()
.putIfNotNull("machines", machines)
.putIfNotNull("user", user)
.putIfNotNull("privateKeyPassphrase", privateKeyPassphrase)
.putIfNotNull("privateKeyFile", privateKeyFile)
.putIfNotNull("privateKeyData", privateKeyData)
.putIfNotNull("localTempDir", localTempDir)
.build());
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy