63 lines
2.7 KiB
Java
63 lines
2.7 KiB
Java
/*
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.g1.humongousObjects.objectGraphTest;
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import java.lang.ref.Reference;
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/**
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* Immutable structure that holds the following information about graph's node
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* reference - weak/soft reference to graph's node
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* graphId and nodeId - graph's and node's ids - we need this for error handling
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* softlyReachable - is node effectively referenced by external soft reference. It could be when external
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* soft reference or when this node is reachable from node that externally referenced by soft reference
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* effectiveHumongous - if node behaves effectively humongous. It could be when node is humongous
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* or when this node is reachable from humongous node.
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*
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* @param <T> - actual type of node
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*/
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public class ReferenceInfo<T> {
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public final Reference<T> reference;
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public final String graphId;
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public final String nodeId;
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public final boolean softlyReachable;
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public final boolean effectiveHumongous;
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public ReferenceInfo(Reference<T> reference, String graphId, String nodeId, boolean softlyReachable,
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boolean effectiveHumongous) {
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this.reference = reference;
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this.graphId = graphId;
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this.nodeId = nodeId;
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this.softlyReachable = softlyReachable;
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this.effectiveHumongous = effectiveHumongous;
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}
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@Override
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public String toString() {
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return String.format("Node %s is effectively %shumongous and effectively %ssoft referenced\n"
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+ "\tReference type is %s and it points to %s", nodeId,
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(effectiveHumongous ? "" : "non-"), (softlyReachable ? "" : "non-"),
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reference.getClass().getSimpleName(), reference.get());
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}
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}
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