/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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 org.switchyard.deploy.karaf;
import org.apache.felix.gogo.commands.Command;
import org.apache.karaf.shell.console.OsgiCommandSupport;
import org.osgi.framework.ServiceRegistration;
import org.switchyard.deploy.osgi.SwitchYardEvent;
import org.switchyard.deploy.osgi.SwitchYardListener;
import java.io.PrintStream;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* Shell commands for deployments.
*/
@Command(scope = "switchyard", name = "deployment-list", description = "List switchyard deployments.")
public class DeploymentList extends OsgiCommandSupport {
private static final String ID_COLUMN_LABEL = "Id";
private static final String NAME_COLUMN_LABEL = "Name";
private static final String STATUS_COLUMN_LABEL = "Status";
private static final int DEFAULT_FORMAT_BUFFER_LENGTH = 24;
private static final String DEFAULT_FIELD_PREAMBLE = "[ ";
private static final String DEFAULT_FIELD_POSTAMBLE = " ]";
private static final String DEFAULT_HEADER_PREAMBLE = " ";
private static final String DEFAULT_HEADER_POSTAMBLE = " ";
private static final int DEFAULT_COLUMN_WIDTH_INCREMENT = 0;
private static final int MAX_COLUMN_WIDTH = Integer.MAX_VALUE;
private final List<SwitchYardEvent> _events = new CopyOnWriteArrayList<SwitchYardEvent>();
@Override
protected Object doExecute() throws Exception {
SwitchYardListener listener = new SwitchYardListener() {
@Override
public void switchyardEvent(SwitchYardEvent event) {
_events.add(event);
}
};
ServiceRegistration<SwitchYardListener> reg = getBundleContext().registerService(SwitchYardListener.class, listener, null);
reg.unregister();
if (!_events.isEmpty()) {
final Map<String, Integer> columnWidths = computeColumnWidths(_events);
final String headerFormat = buildFormatString(columnWidths, true);
final String rowFormat = buildFormatString(columnWidths, false);
final PrintStream out = System.out;
out.println(String.format(headerFormat, ID_COLUMN_LABEL, NAME_COLUMN_LABEL, STATUS_COLUMN_LABEL));
for (SwitchYardEvent event : _events) {
out.println(String.format(rowFormat, getId(event), getName(event), getStatus(event)));
}
}
return null;
}
private static Map<String, Integer> computeColumnWidths(final Iterable<SwitchYardEvent> events) throws Exception {
if (events == null) {
throw new IllegalArgumentException("Unable to determine column widths from null Iterable<SwitchyardEvent>");
} else {
int maxIdLen = 0;
int maxNameLen = 0;
int maxStatusLen = 0;
for (final SwitchYardEvent event : events) {
maxIdLen = java.lang.Math.max(maxIdLen, getId(event).length());
maxNameLen = java.lang.Math.max(maxNameLen, getName(event).length());
maxStatusLen = java.lang.Math.max(maxStatusLen, getStatus(event).length());
}
final Map<String, Integer> retval = new Hashtable<String, Integer>(3);
retval.put(ID_COLUMN_LABEL, maxIdLen);
retval.put(NAME_COLUMN_LABEL, maxNameLen);
retval.put(STATUS_COLUMN_LABEL, maxStatusLen);
return retval;
}
}
private static String getId(SwitchYardEvent event) {
return Long.toString(event.getBundle().getBundleId());
}
private static String getName(SwitchYardEvent event) {
return event.getBundle().getSymbolicName();
}
private static String getStatus(SwitchYardEvent event) {
switch (event.getType()) {
case SwitchYardEvent.CREATING: return "Creating";
case SwitchYardEvent.GRACE_PERIOD: return "Grace Period";
case SwitchYardEvent.CREATED: return "Created";
case SwitchYardEvent.DESTROYING: return "Destroying";
case SwitchYardEvent.DESTROYED: return "Destroyed";
case SwitchYardEvent.FAILURE: return "Failure";
default: return "Unknown";
}
}
private static String buildFormatString(final Map<String, Integer> columnWidths, final boolean isHeader) {
final String fieldPreamble;
final String fieldPostamble;
final int columnWidthIncrement;
if (isHeader) {
fieldPreamble = DEFAULT_HEADER_PREAMBLE;
fieldPostamble = DEFAULT_HEADER_POSTAMBLE;
} else {
fieldPreamble = DEFAULT_FIELD_PREAMBLE;
fieldPostamble = DEFAULT_FIELD_POSTAMBLE;
}
columnWidthIncrement = DEFAULT_COLUMN_WIDTH_INCREMENT;
final int idLen = java.lang.Math.min(columnWidths.get(ID_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH);
final int nameLen = java.lang.Math.min(columnWidths.get(NAME_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH);
final int statusLen = java.lang.Math.min(columnWidths.get(STATUS_COLUMN_LABEL) + columnWidthIncrement, MAX_COLUMN_WIDTH);
final StringBuilder retval = new StringBuilder(DEFAULT_FORMAT_BUFFER_LENGTH);
retval.append(fieldPreamble).append("%-").append(idLen).append('.').append(idLen).append('s').append(fieldPostamble).append(' ');
retval.append(fieldPreamble).append("%-").append(nameLen).append('.').append(nameLen).append('s').append(fieldPostamble).append(' ');
retval.append(fieldPreamble).append("%-").append(statusLen).append('.').append(statusLen).append('s').append(fieldPostamble).append(' ');
return retval.toString();
}
}