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## org.optaplanner.core.impl.constructionheuristic.placer
Class AbstractPlacer

    java.lang.Object
      org.optaplanner.core.impl.constructionheuristic.placer.AbstractPlacer

All Implemented Interfaces:
  EventListener, Placer, SolverPhaseLifecycleListener, SolverLifecycleListener

Direct Known Subclasses:
  QueuedEntityPlacer, ValuePlacer

    public abstract class AbstractPlacer

extends Object
implements Placer

Abstract superclass for `Placer`.

See Also:
  `Placer`

Field Summary
`protected org.slf4j.Logger` | `logger`
`protected SolverPhaseLifecycleSupport` | `solverPhaseLifecycleSupport`
`protected Random` | `workingRandom`

Constructor Summary
`AbstractPlacer()`

Method Summary
`void` | `phaseEnded(AbstractSolverPhaseScope solverPhaseScope)`
`void` | `phaseStarted(AbstractSolverPhaseScope solverPhaseScope)`
`void` | `solvingEnded(DefaultSolverScope solverScope)`
`void` | `solvingStarted(DefaultSolverScope solverScope)`
`void` | `stepEnded(AbstractStepScope stepScope)`
`void` | `stepStarted(AbstractStepScope stepScope)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### logger

    protected final transient org.slf4j.Logger logger

### solverPhaseLifecycleSupport

    protected SolverPhaseLifecycleSupport solverPhaseLifecycleSupport

### workingRandom

    protected Random workingRandom

Constructor Detail

### AbstractPlacer

    public AbstractPlacer()

Method Detail

### solvingStarted

    public void solvingStarted(DefaultSolverScope solverScope)

  Specified by:
    `solvingStarted` in interface `SolverLifecycleListener`

### phaseStarted

    public void phaseStarted(AbstractSolverPhaseScope solverPhaseScope)

  Specified by:
    `phaseStarted` in interface `SolverPhaseLifecycleListener`

### stepStarted

    public void stepStarted(AbstractStepScope stepScope)

  Specified by:
    `stepStarted` in interface `SolverPhaseLifecycleListener`

### stepEnded

    public void stepEnded(AbstractStepScope stepScope)

  Specified by:
    `stepEnded` in interface `SolverPhaseLifecycleListener`

### phaseEnded

    public void phaseEnded(AbstractSolverPhaseScope solverPhaseScope)

  Specified by:
    `phaseEnded` in interface `SolverPhaseLifecycleListener`

### solvingEnded

    public void solvingEnded(DefaultSolverScope solverScope)

  Specified by:
    `solvingEnded` in interface `SolverLifecycleListener`

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