dk.ilios.spanner.bridge.VmPropertiesLogMessage.java Source code

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Here is the source code for dk.ilios.spanner.bridge.VmPropertiesLogMessage.java

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/*
 * Copyright (C) 2012 Google Inc.
 *
 * 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.
 */

package dk.ilios.spanner.bridge;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.base.Objects;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;

import java.io.Serializable;

/**
 * A message containing a selection of {@link System#getProperties() system properties} from the
 * worker JVM.
 */
public class VmPropertiesLogMessage extends LogMessage implements Serializable {
    private static final long serialVersionUID = 1L;

    private final ImmutableMap<String, String> properties;

    public VmPropertiesLogMessage() {
        this(ImmutableMap.copyOf(Maps.fromProperties(System.getProperties())));
    }

    public VmPropertiesLogMessage(ImmutableMap<String, String> properties) {
        this.properties = checkNotNull(properties);
    }

    public ImmutableMap<String, String> properties() {
        return properties;
    }

    @Override
    public void accept(LogMessageVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(properties);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        } else if (obj instanceof VmPropertiesLogMessage) {
            VmPropertiesLogMessage that = (VmPropertiesLogMessage) obj;
            return this.properties.equals(that.properties);
        } else {
            return false;
        }
    }
}